[yt-svn] commit/yt: brittonsmith: Merged in ngoldbaum/yt (pull request #1762)

commits-noreply at bitbucket.org commits-noreply at bitbucket.org
Mon Oct 12 11:30:00 PDT 2015


1 new commit in yt:

https://bitbucket.org/yt_analysis/yt/commits/03e316bc6fdd/
Changeset:   03e316bc6fdd
Branch:      yt
User:        brittonsmith
Date:        2015-10-12 18:29:43+00:00
Summary:     Merged in ngoldbaum/yt (pull request #1762)

Linting yt.frontends
Affected #:  112 files

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d doc/source/reference/api/api.rst
--- a/doc/source/reference/api/api.rst
+++ b/doc/source/reference/api/api.rst
@@ -211,8 +211,6 @@
    ~yt.frontends.boxlib.data_structures.OrionDataset
    ~yt.frontends.boxlib.fields.BoxlibFieldInfo
    ~yt.frontends.boxlib.io.IOHandlerBoxlib
-   ~yt.frontends.boxlib.io.IOHandlerCastro
-   ~yt.frontends.boxlib.io.IOHandlerNyx
    ~yt.frontends.boxlib.io.IOHandlerOrion
 
 Chombo

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/_skeleton/data_structures.py
--- a/yt/frontends/_skeleton/data_structures.py
+++ b/yt/frontends/_skeleton/data_structures.py
@@ -13,6 +13,8 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
+import os
+
 from yt.data_objects.grid_patch import \
     AMRGridPatch
 from yt.geometry.grid_geometry_handler import \

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/_skeleton/fields.py
--- a/yt/frontends/_skeleton/fields.py
+++ b/yt/frontends/_skeleton/fields.py
@@ -13,8 +13,6 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-import numpy as np
-from yt.funcs import mylog
 from yt.fields.field_info_container import \
     FieldInfoContainer
 

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/_skeleton/setup.py
--- a/yt/frontends/_skeleton/setup.py
+++ b/yt/frontends/_skeleton/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/art/data_structures.py
--- a/yt/frontends/art/data_structures.py
+++ b/yt/frontends/art/data_structures.py
@@ -9,48 +9,47 @@
 #
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
+import glob
 import numpy as np
 import os
 import stat
+import struct
 import weakref
-from yt.extern.six.moves import cStringIO
-import difflib
-import glob
 
-from yt.funcs import *
 from yt.geometry.oct_geometry_handler import \
     OctreeIndex
 from yt.geometry.geometry_handler import \
-    Index, YTDataChunk
+    YTDataChunk
 from yt.data_objects.static_output import \
     Dataset, ParticleFile
 from yt.data_objects.octree_subset import \
     OctreeSubset
+from yt.funcs import \
+    mylog
 from yt.geometry.oct_container import \
     ARTOctreeContainer
-from .fields import ARTFieldInfo
-from yt.utilities.io_handler import \
-    io_registry
-from yt.utilities.lib.misc_utilities import \
-    get_box_grids_level
+from yt.frontends.art.definitions import \
+    fluid_fields, \
+    particle_fields, \
+    filename_pattern, \
+    particle_header_struct, \
+    amr_header_struct, \
+    dmparticle_header_struct, \
+    constants, \
+    seek_extras
+from yt.frontends.art.fields import ARTFieldInfo
 from yt.data_objects.particle_unions import \
     ParticleUnion
 from yt.geometry.particle_geometry_handler import \
     ParticleIndex
-from yt.utilities.lib.geometry_utils import compute_morton
 
-from yt.frontends.art.definitions import *
 import yt.utilities.fortran_utils as fpu
-from .io import _read_art_level_info
-from .io import _read_child_level
-from .io import _read_root_level
-from .io import b2t
-from .io import a2b
-
-from yt.utilities.io_handler import \
-    io_registry
-from yt.fields.field_info_container import \
-    FieldInfoContainer, NullFunc
+from yt.frontends.art.io import \
+    _read_art_level_info, \
+    _read_child_level, \
+    _read_root_level, \
+    b2t, \
+    a2b
 
 
 class ARTIndex(OctreeIndex):
@@ -181,8 +180,6 @@
         self.max_level = limit_level
         self.force_max_level = force_max_level
         self.spread_age = spread_age
-        self.domain_left_edge = np.zeros(3, dtype='float')
-        self.domain_right_edge = np.zeros(3, dtype='float')+1.0
         Dataset.__init__(self, filename, dataset_type,
                          units_override=units_override)
         self.storage_filename = storage_filename
@@ -231,7 +228,6 @@
         aexpn = self.parameters["aexpn"]
 
         # all other units
-        wmu = self.parameters["wmu"]
         Om0 = self.parameters['Om0']
         ng = self.parameters['ng']
         boxh = self.parameters['boxh']
@@ -255,6 +251,8 @@
         """
         Get the various simulation parameters & constants.
         """
+        self.domain_left_edge = np.zeros(3, dtype='float')
+        self.domain_right_edge = np.zeros(3, dtype='float')+1.0
         self.dimensionality = 3
         self.refine_by = 2
         self.periodicity = (True, True, True)
@@ -268,7 +266,7 @@
         with open(self._file_amr, 'rb') as f:
             amr_header_vals = fpu.read_attrs(f, amr_header_struct, '>')
             for to_skip in ['tl', 'dtl', 'tlold', 'dtlold', 'iSO']:
-                skipped = fpu.skip(f, endian='>')
+                fpu.skip(f, endian='>')
             (self.ncell) = fpu.read_vector(f, 'i', '>')[0]
             # Try to figure out the root grid dimensions
             est = int(np.rint(self.ncell**(1.0/3.0)))
@@ -383,7 +381,7 @@
             return False
         with open(f, 'rb') as fh:
             try:
-                amr_header_vals = fpu.read_attrs(fh, amr_header_struct, '>')
+                fpu.read_attrs(fh, amr_header_struct, '>')
                 return True
             except:
                 return False
@@ -425,8 +423,6 @@
         self.parameter_filename = filename
         self.skip_stars = skip_stars
         self.spread_age = spread_age
-        self.domain_left_edge = np.zeros(3, dtype='float')
-        self.domain_right_edge = np.zeros(3, dtype='float')+1.0
         Dataset.__init__(self, filename, dataset_type)
         self.storage_filename = storage_filename
 
@@ -470,7 +466,6 @@
         aexpn = self.parameters["aexpn"]
 
         # all other units
-        wmu = self.parameters["wmu"]
         Om0 = self.parameters['Om0']
         ng = self.parameters['ng']
         boxh = self.parameters['boxh']
@@ -494,6 +489,8 @@
         """
         Get the various simulation parameters & constants.
         """
+        self.domain_left_edge = np.zeros(3, dtype='float')
+        self.domain_right_edge = np.zeros(3, dtype='float')+1.0
         self.dimensionality = 3
         self.refine_by = 2
         self.periodicity = (True, True, True)
@@ -633,32 +630,32 @@
             try:
                 seek = 4
                 fh.seek(seek)
-                headerstr = np.fromfile(fh, count=1, dtype=(str,45))
-                aexpn = np.fromfile(fh, count=1, dtype='>f4')
-                aexp0 = np.fromfile(fh, count=1, dtype='>f4')
-                amplt = np.fromfile(fh, count=1, dtype='>f4')
-                astep = np.fromfile(fh, count=1, dtype='>f4')
-                istep = np.fromfile(fh, count=1, dtype='>i4')
-                partw = np.fromfile(fh, count=1, dtype='>f4')
-                tintg = np.fromfile(fh, count=1, dtype='>f4')
-                ekin = np.fromfile(fh, count=1, dtype='>f4')
-                ekin1 = np.fromfile(fh, count=1, dtype='>f4')
-                ekin2 = np.fromfile(fh, count=1, dtype='>f4')
-                au0 = np.fromfile(fh, count=1, dtype='>f4')
-                aeu0 = np.fromfile(fh, count=1, dtype='>f4')
-                nrowc = np.fromfile(fh, count=1, dtype='>i4')
-                ngridc = np.fromfile(fh, count=1, dtype='>i4')
-                nspecs = np.fromfile(fh, count=1, dtype='>i4')
-                nseed = np.fromfile(fh, count=1, dtype='>i4')
-                Om0 = np.fromfile(fh, count=1, dtype='>f4')
-                Oml0 = np.fromfile(fh, count=1, dtype='>f4')
-                hubble = np.fromfile(fh, count=1, dtype='>f4')
-                Wp5 = np.fromfile(fh, count=1, dtype='>f4')
-                Ocurv = np.fromfile(fh, count=1, dtype='>f4')
-                wspecies = np.fromfile(fh, count=10, dtype='>f4')
-                lspecies = np.fromfile(fh, count=10, dtype='>i4')
-                extras = np.fromfile(fh, count=79, dtype='>f4')
-                boxsize = np.fromfile(fh, count=1, dtype='>f4')
+                headerstr = np.fromfile(fh, count=1, dtype=(str,45))  # NOQA
+                aexpn = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                aexp0 = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                amplt = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                astep = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                istep = np.fromfile(fh, count=1, dtype='>i4')  # NOQA
+                partw = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                tintg = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                ekin = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                ekin1 = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                ekin2 = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                au0 = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                aeu0 = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                nrowc = np.fromfile(fh, count=1, dtype='>i4')  # NOQA
+                ngridc = np.fromfile(fh, count=1, dtype='>i4')  # NOQA
+                nspecs = np.fromfile(fh, count=1, dtype='>i4')  # NOQA
+                nseed = np.fromfile(fh, count=1, dtype='>i4')  # NOQA
+                Om0 = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                Oml0 = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                hubble = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                Wp5 = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                Ocurv = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
+                wspecies = np.fromfile(fh, count=10, dtype='>f4')  # NOQA
+                lspecies = np.fromfile(fh, count=10, dtype='>i4')  # NOQA
+                extras = np.fromfile(fh, count=79, dtype='>f4')  # NOQA
+                boxsize = np.fromfile(fh, count=1, dtype='>f4')  # NOQA
                 return True
             except:
                 return False
@@ -702,7 +699,7 @@
         oct_handler.fill_level(0, levels, cell_inds, file_inds, tr, source)
         del source
         # Now we continue with the additional levels.
-        for level in range(1, self.ds.max_level + 1):
+        for level in range(1, self.ds.index.max_level + 1):
             no = self.domain.level_count[level]
             noct_range = [0, no]
             source = _read_child_level(
@@ -789,9 +786,7 @@
             Level[Lev], iNOLL[Lev], iHOLL[Lev] = fpu.read_vector(f, 'i', '>')
             # print 'Level %i : '%Lev, iNOLL
             # print 'offset after level record:',f.tell()
-            iOct = iHOLL[Lev] - 1
             nLevel = iNOLL[Lev]
-            nLevCells = nLevel * nchild
             ntot = ntot + nLevel
 
             # Skip all the oct hierarchy data
@@ -834,11 +829,9 @@
 
     def _read_amr_root(self, oct_handler):
         self.level_offsets
-        f = open(self.ds._file_amr, "rb")
         # add the root *cell* not *oct* mesh
         root_octs_side = self.ds.domain_dimensions[0]/2
         NX = np.ones(3)*root_octs_side
-        octs_side = NX*2 # Level == 0
         LE = np.array([0.0, 0.0, 0.0], dtype='float64')
         RE = np.array([1.0, 1.0, 1.0], dtype='float64')
         root_dx = (RE - LE) / NX
@@ -849,7 +842,7 @@
                            LL[1]:RL[1]:NX[1]*1j,
                            LL[2]:RL[2]:NX[2]*1j]
         root_fc = np.vstack([p.ravel() for p in root_fc]).T
-        nocts_check = oct_handler.add(self.domain_id, 0, root_fc)
+        oct_handler.add(self.domain_id, 0, root_fc)
         assert(oct_handler.nocts == root_fc.shape[0])
         mylog.debug("Added %07i octs on level %02i, cumulative is %07i",
                     root_octs_side**3, 0, oct_handler.nocts)

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/art/fields.py
--- a/yt/frontends/art/fields.py
+++ b/yt/frontends/art/fields.py
@@ -13,13 +13,8 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-import numpy as np
-
 from yt.fields.field_info_container import \
     FieldInfoContainer
-from yt.units.yt_array import \
-    YTArray
-from yt.frontends.art.definitions import *
 
 b_units = "code_magnetic"
 ra_units = "code_length / code_time**2"
@@ -68,7 +63,7 @@
             tr *= data.ds.parameters['wmu'] * data.ds.parameters['Om0']
             tr *= (data.ds.parameters['gamma'] - 1.)
             tr /= data.ds.parameters['aexpn']**2
-            return  tr * data['art', 'GasEnergy'] / data['art', 'Density']
+            return tr * data['art', 'GasEnergy'] / data['art', 'Density']
         self.add_field(('gas', 'temperature'),
                        function=_temperature, 
                        units='K')

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/art/io.py
--- a/yt/frontends/art/io.py
+++ b/yt/frontends/art/io.py
@@ -15,24 +15,30 @@
 
 
 import numpy as np
-import struct
 import os
 import os.path
 import sys
+
+from collections import defaultdict
+
 if sys.version_info >= (3,0,0):
     long = int
-    
-from yt.funcs import *
+
+from yt.frontends.art.definitions import \
+    particle_star_fields, \
+    particle_fields, \
+    star_struct, \
+    hydro_struct
 from yt.utilities.io_handler import \
     BaseIOHandler
-from yt.utilities.fortran_utils import *
 from yt.utilities.logger import ytLogger as mylog
-from yt.frontends.art.definitions import *
-from yt.utilities.physical_constants import sec_per_year
 from yt.utilities.lib.geometry_utils import compute_morton
-from yt.geometry.oct_container import _ORDER_MAX
-from yt.units.yt_array import YTQuantity
-
+from yt.utilities.fortran_utils import \
+    read_vector, \
+    skip
+from yt.units.yt_array import \
+    YTQuantity, \
+    YTArray
 
 class IOHandlerART(BaseIOHandler):
     _dataset_type = "art"
@@ -80,7 +86,6 @@
         key = (selector, ftype)
         if key in self.masks.keys() and self.caching:
             return self.masks[key]
-        ds = self.ds
         pstr = 'particle_position_%s'
         x,y,z = [self._get_field((ftype, pstr % ax)) for ax in 'xyz']
         mask = selector.select_points(x, y, z, 0.0)
@@ -120,7 +125,7 @@
         tr = {}
         ftype, fname = field
         ptmax = self.ws[-1]
-        pbool, idxa, idxb = _determine_field_size(self.ds, ftype, 
+        pbool, idxa, idxb = _determine_field_size(self.ds, ftype,
                                                   self.ls, ptmax)
         npa = idxb - idxa
         sizes = np.diff(np.concatenate(([0], self.ls)))
@@ -178,7 +183,7 @@
             # dark_matter -- stars are regular matter.
             tr[field] /= self.ds.domain_dimensions.prod()
         if tr == {}:
-            tr = dict((f, np.array([])) for f in fields)
+            tr = dict((f, np.array([])) for f in [field])
         if self.caching:
             self.cache[field] = tr[field]
             return self.cache[field]
@@ -195,7 +200,6 @@
         count = data_file.ds.parameters['lspecies'][-1]
         DLE = data_file.ds.domain_left_edge
         DRE = data_file.ds.domain_right_edge
-        dx = (DRE - DLE) / 2**_ORDER_MAX
         with open(data_file.filename, "rb") as f:
             # The first total_particles * 3 values are positions
             pp = np.fromfile(f, dtype = '>f4', count = totcount*3)
@@ -209,7 +213,6 @@
 
     def _identify_fields(self, domain):
         field_list = []
-        tp = domain.total_particles
         self.particle_field_list = [f for f in particle_fields]
         for ptype in self.ds.particle_types_raw:
             for pfield in self.particle_field_list:
@@ -225,7 +228,7 @@
         tr = {}
         ftype, fname = field
         ptmax = self.ws[-1]
-        pbool, idxa, idxb = _determine_field_size(self.ds, ftype, 
+        pbool, idxa, idxb = _determine_field_size(self.ds, ftype,
                                                   self.ls, ptmax)
         npa = idxb - idxa
         sizes = np.diff(np.concatenate(([0], self.ls)))
@@ -258,17 +261,6 @@
                     data[a: a + size] = i
                     a += size
             tr[field] = data
-        if fname == "particle_creation_time":
-            self.tb, self.ages, data = interpolate_ages(
-                tr[field][-nstars:],
-                self.file_stars,
-                self.tb,
-                self.ages,
-                self.ds.current_time)
-            temp = tr.get(field, np.zeros(npa, 'f8'))
-            temp[-nstars:] = data
-            tr[field] = temp
-            del data
         # We check again, after it's been filled
         if fname.startswith("particle_mass"):
             # We now divide by NGrid in order to make this match up.  Note that
@@ -356,7 +348,6 @@
     # ioct always represents the index of the next variable
     # not the current, so shift forward one index
     # the last index isn't used
-    ioctso = iocts.copy()
     iocts[1:] = iocts[:-1]  # shift
     iocts = iocts[:nLevel]  # chop off the last, unused, index
     iocts[0] = iOct  # starting value
@@ -400,11 +391,11 @@
     # Posy   = d_x * (iOctPs(2,iO) + sign ( id , idelta(j,2) ))
     # Posz   = d_x * (iOctPs(3,iO) + sign ( id , idelta(j,3) ))
     # idelta = [[-1,  1, -1,  1, -1,  1, -1,  1],
-              #[-1, -1,  1,  1, -1, -1,  1,  1],
-              #[-1, -1, -1, -1,  1,  1,  1,  1]]
+    #           [-1, -1,  1,  1, -1, -1,  1,  1],
+    #           [-1, -1, -1, -1,  1,  1,  1,  1]]
     # idelta = np.array(idelta)
     # if ncell0 is None:
-        # ncell0 = coarse_grid**3
+    #     ncell0 = coarse_grid**3
     # nchild = 8
     # ndim = 3
     # nshift = nchild -1
@@ -424,15 +415,13 @@
     f.seek(pos)
     return unitary_center, fl, iocts, nLevel, root_level
 
-def get_ranges(skip, count, field, words=6, real_size=4, np_per_page=4096**2, 
+def get_ranges(skip, count, field, words=6, real_size=4, np_per_page=4096**2,
                   num_pages=1):
     #translate every particle index into a file position ranges
     ranges = []
     arr_size = np_per_page * real_size
-    page_size = words * np_per_page * real_size
     idxa, idxb = 0, 0
     posa, posb = 0, 0
-    left = count
     for page in range(num_pages):
         idxb += np_per_page
         for i, fname in enumerate(['x', 'y', 'z', 'vx', 'vy', 'vz']):
@@ -462,7 +451,7 @@
     num_pages = os.path.getsize(file)/(real_size*words*np_per_page)
     fh = open(file, 'r')
     skip, count = idxa, idxb - idxa
-    kwargs = dict(words=words, real_size=real_size, 
+    kwargs = dict(words=words, real_size=real_size,
                   np_per_page=np_per_page, num_pages=num_pages)
     arrs = []
     for field in fields:
@@ -495,7 +484,6 @@
 
 def _read_child_mask_level(f, level_child_offsets, level, nLevel, nhydro_vars):
     f.seek(level_child_offsets[level])
-    nvals = nLevel * (nhydro_vars + 6)  # 2 vars, 2 pads
     ioctch = np.zeros(nLevel, dtype='uint8')
     idc = np.zeros(nLevel, dtype='int32')
 
@@ -639,8 +627,6 @@
         return a2t(b2a(tb))
     if len(tb) < n:
         n = len(tb)
-    age_min = a2t(b2a(tb.max(), **kwargs), **kwargs)
-    age_max = a2t(b2a(tb.min(), **kwargs), **kwargs)
     tbs = -1.*np.logspace(np.log10(-tb.min()),
                           np.log10(-tb.max()), n)
     ages = []

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/art/setup.py
--- a/yt/frontends/art/setup.py
+++ b/yt/frontends/art/setup.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
-import setuptools
-import os, sys, os.path
+
 
 def configuration(parent_package='',top_path=None):
     from numpy.distutils.misc_util import Configuration

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/art/tests/test_outputs.py
--- a/yt/frontends/art/tests/test_outputs.py
+++ b/yt/frontends/art/tests/test_outputs.py
@@ -17,49 +17,60 @@
 from yt.testing import \
     requires_file, \
     assert_equal, \
-    units_override_check
+    units_override_check, \
+    assert_almost_equal
+from yt.units.yt_array import \
+    YTQuantity
 from yt.utilities.answer_testing.framework import \
     requires_ds, \
-    big_patch_amr, \
+    FieldValuesTest, \
     PixelizedProjectionValuesTest, \
     data_dir_load
 from yt.frontends.art.api import ARTDataset
 
-_fields = ("density", "temperature", "particle_mass", ("all", "particle_position_x"))
+_fields = (
+    ("gas", "density"),
+    ("gas", "temperature"),
+    ("all", "particle_mass"),
+    ("all", "particle_position_x")
+)
 
 d9p = "D9p_500/10MpcBox_HartGal_csf_a0.500.d"
 
 @requires_ds(d9p, big_data=True)
 def test_d9p():
     ds = data_dir_load(d9p)
+    ds.index
     yield assert_equal, str(ds), "10MpcBox_HartGal_csf_a0.500.d"
-    for test in big_patch_amr(d9p, _fields):
-        test_d9p.__name__ = test.description
-        yield test
     dso = [None, ("sphere", ("max", (0.1, 'unitary')))]
     for field in _fields:
         for axis in [0, 1, 2]:
             for dobj_name in dso:
                 for weight_field in [None, "density"]:
-                    yield PixelizedProjectionValuesTest(
-                        d9p, axis, field, weight_field,
-                        dobj_name)
-
+                    if field[0] not in ds.particle_types:
+                        yield PixelizedProjectionValuesTest(
+                            d9p, axis, field, weight_field,
+                            dobj_name)
+            yield FieldValuesTest(d9p, field, dobj_name)
 
     ad = ds.all_data()
     # 'Ana' variable values output from the ART Fortran 'ANA' analysis code
     AnaNStars = 6255
-    yield assert_equal, ad[('stars','particle_type')].size, AnaNStars
+    yield assert_equal, ad[('stars', 'particle_type')].size, AnaNStars
     yield assert_equal, ad[('specie4', 'particle_type')].size, AnaNStars
-    AnaNDM = 2833405
-    yield assert_equal, ad[('darkmatter','particle_type')].size, AnaNDM
-    yield assert_equal, ad[('specie0', 'particle_type')].size + \
-        ad[('specie1', 'particle_type')].size + \
-        ad[('specie2', 'particle_type')].size + \
-        ad[('specie3', 'particle_type')].size, AnaNDM
 
-    AnaBoxSize = yt.units.yt_array.YTQuantity(7.1442196564,'Mpc')
-    AnaVolume = yt.units.yt_array.YTQuantity(364.640074656,'Mpc**3')
+    # The *real* asnwer is 2833405, but yt misses one particle since it lives
+    # on a domain boundary. See issue 814. When that is fixed, this test
+    # will need to be updated
+    AnaNDM = 2833404
+    yield assert_equal, ad[('darkmatter', 'particle_type')].size, AnaNDM
+    yield assert_equal, (ad[('specie0', 'particle_type')].size +
+                         ad[('specie1', 'particle_type')].size +
+                         ad[('specie2', 'particle_type')].size +
+                         ad[('specie3', 'particle_type')].size), AnaNDM
+
+    AnaBoxSize = YTQuantity(7.1442196564, 'Mpc')
+    AnaVolume = YTQuantity(364.640074656, 'Mpc**3')
     Volume = 1
     for i in ds.domain_width.in_units('Mpc'):
         yield assert_almost_equal, i, AnaBoxSize
@@ -67,26 +78,29 @@
     yield assert_almost_equal, Volume, AnaVolume
 
     AnaNCells = 4087490
-    yield assert_equal, len(ad[('index','cell_volume')]), AnaNCells
+    yield assert_equal, len(ad[('index', 'cell_volume')]), AnaNCells
 
-    AnaTotDMMass = yt.units.yt_array.YTQuantity(1.01191786811e+14,'Msun')
-    yield assert_almost_equal, ad[('darkmatter','particle_mass')].sum()\
-        .in_units('Msun'), AnaTotDMMass
+    AnaTotDMMass = YTQuantity(1.01191786808255e+14, 'Msun')
+    yield (assert_almost_equal,
+           ad[('darkmatter', 'particle_mass')].sum().in_units('Msun'),
+           AnaTotDMMass)
 
-    AnaTotStarMass = yt.units.yt_array.YTQuantity(1776251.,'Msun')
-    yield assert_almost_equal, ad[('stars','particle_mass')].sum()\
-        .in_units('Msun'), AnaTotStarMass
+    AnaTotStarMass = YTQuantity(1776701.3990607238, 'Msun')
+    yield (assert_almost_equal,
+           ad[('stars', 'particle_mass')].sum().in_units('Msun'),
+           AnaTotStarMass)
 
-    AnaTotStarMassInitial = yt.units.yt_array.YTQuantity(2422854.,'Msun')
-    yield assert_almost_equal, ad[('stars','particle_mass_initial')].sum()\
-        .in_units('Msun'), AnaTotStarMass
+    AnaTotStarMassInitial = YTQuantity(2423468.2801332865, 'Msun')
+    yield (assert_almost_equal,
+           ad[('stars', 'particle_mass_initial')].sum().in_units('Msun'),
+           AnaTotStarMassInitial)
 
-    AnaTotGasMass = yt.units.yt_array.YTQuantity(1.781994e+13,'Msun')
-    yield assert_almost_equal, ad[('gas','cell_mass')].sum()\
-        .in_units('Msun'), AnaTotGasMass
+    AnaTotGasMass = YTQuantity(1.7826982029216785e+13, 'Msun')
+    yield (assert_almost_equal, ad[('gas', 'cell_mass')].sum().in_units('Msun'),
+           AnaTotGasMass)
 
-    AnaTotTemp = yt.units.yt_array.YTQuantity(1.5019e11, 'K') #just leaves
-    yield assert_equal, ad[('gas','temperature')].sum(), AnaTotTemp
+    AnaTotTemp = YTQuantity(150219844793.39072, 'K')  # just leaves
+    yield assert_equal, ad[('gas', 'temperature')].sum(), AnaTotTemp
 
 
 @requires_file(d9p)
@@ -97,4 +111,3 @@
 def test_units_override():
     for test in units_override_check(d9p):
         yield test
-

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/artio/data_structures.py
--- a/yt/frontends/artio/data_structures.py
+++ b/yt/frontends/artio/data_structures.py
@@ -13,26 +13,27 @@
 #
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
+
 import numpy as np
+import os
 import stat
 import weakref
-from yt.extern.six.moves import cStringIO
 
-from .definitions import ARTIOconstants
-from ._artio_caller import \
-    artio_is_valid, artio_fileset, ARTIOOctreeContainer, \
-    ARTIORootMeshContainer, ARTIOSFCRangeHandler
-from . import _artio_caller
-from yt.utilities.definitions import \
-    mpc_conversion, sec_conversion
-from .fields import \
+from collections import defaultdict
+
+from yt.frontends.artio._artio_caller import \
+    artio_is_valid, \
+    artio_fileset, \
+    ARTIOSFCRangeHandler
+from yt.frontends.artio import _artio_caller
+from yt.frontends.artio.fields import \
     ARTIOFieldInfo
-from yt.fields.particle_fields import \
-    standard_particle_fields
 
-from yt.funcs import *
+from yt.funcs import \
+    mylog
 from yt.geometry.geometry_handler import \
-    Index, YTDataChunk
+    Index, \
+    YTDataChunk
 import yt.geometry.particle_deposit as particle_deposit
 from yt.data_objects.static_output import \
     Dataset
@@ -40,9 +41,8 @@
     OctreeSubset
 from yt.data_objects.data_containers import \
     YTFieldData
-
-from yt.fields.field_info_container import \
-    FieldInfoContainer, NullFunc
+from yt.utilities.exceptions import \
+    YTParticleDepositionNotImplemented
 
 class ARTIOOctreeSubset(OctreeSubset):
     _domain_offset = 0
@@ -346,7 +346,6 @@
         # hard-coded -- not provided by headers
         self.dimensionality = 3
         self.refine_by = 2
-        print(self.parameters)
         self.parameters["HydroMethod"] = 'artio'
         self.parameters["Time"] = 1.  # default unit is 1...
 

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/artio/fields.py
--- a/yt/frontends/artio/fields.py
+++ b/yt/frontends/artio/fields.py
@@ -14,9 +14,6 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-import numpy as np
-
-from yt.funcs import mylog
 from yt.fields.field_info_container import \
     FieldInfoContainer
 from yt.fields.field_detector import \
@@ -25,8 +22,6 @@
     YTArray
 
 from yt.utilities.physical_constants import \
-    mh, \
-    mass_sun_cgs, \
     boltzmann_constant_cgs, \
     amu_cgs
 

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/artio/setup.py
--- a/yt/frontends/artio/setup.py
+++ b/yt/frontends/artio/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 import glob
 
 

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/artio/tests/test_outputs.py
--- a/yt/frontends/artio/tests/test_outputs.py
+++ b/yt/frontends/artio/tests/test_outputs.py
@@ -14,7 +14,10 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.testing import *
+from yt.testing import \
+    assert_equal, \
+    requires_file, \
+    units_override_check
 from yt.utilities.answer_testing.framework import \
     requires_ds, \
     data_dir_load, \

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/athena/data_structures.py
--- a/yt/frontends/athena/data_structures.py
+++ b/yt/frontends/athena/data_structures.py
@@ -13,25 +13,27 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.utilities.on_demand_imports import _h5py as h5py
 import numpy as np
+import os
 import weakref
-import glob #ST 9/12
-from yt.funcs import *
+import glob
+
+from yt.funcs import \
+    mylog, \
+    ensure_tuple
 from yt.data_objects.grid_patch import \
-           AMRGridPatch
+    AMRGridPatch
 from yt.geometry.grid_geometry_handler import \
     GridIndex
 from yt.data_objects.static_output import \
-           Dataset
+    Dataset
 from yt.utilities.lib.misc_utilities import \
     get_box_grids_level
 from yt.geometry.geometry_handler import \
     YTDataChunk
-from yt.extern.six import PY2, PY3
+from yt.extern.six import PY2
 
 from .fields import AthenaFieldInfo
-from yt.units.yt_array import YTQuantity
 from yt.utilities.decompose import \
     decompose_array, get_psize
 
@@ -75,9 +77,9 @@
 
 class AthenaGrid(AMRGridPatch):
     _id_offset = 0
+
     def __init__(self, id, index, level, start, dimensions,
                  file_offset, read_dims):
-        df = index.dataset.filename[4:-4]
         gname = index.grid_filenames[id]
         AMRGridPatch.__init__(self, id, filename = gname,
                               index = index)
@@ -224,7 +226,6 @@
         grid = {}
         grid['read_field'] = None
         grid['read_type'] = None
-        table_read=False
         line = f.readline()
         while grid['read_field'] is None:
             parse_line(line, grid)
@@ -270,7 +271,6 @@
             gridread = {}
             gridread['read_field'] = None
             gridread['read_type'] = None
-            table_read=False
             line = f.readline()
             while gridread['read_field'] is None:
                 parse_line(line, gridread)
@@ -421,8 +421,6 @@
                                 self.grid_levels[i] + 1,
                                 self.grid_left_edge, self.grid_right_edge,
                                 self.grid_levels, mask)
-                #ids = np.where(mask.astype("bool")) # where is a tuple
-                #mask[ids] = True
             grid.Children = [g for g in self.grids[mask.astype("bool")] if g.Level == grid.Level + 1]
         mylog.debug("Second pass; identifying parents")
         for i, grid in enumerate(self.grids): # Second pass
@@ -436,7 +434,6 @@
         return [g for g in self.grids[mask] if g.Level == grid.Level + 1]
 
     def _chunk_io(self, dobj, cache = True, local_only = False):
-        gfiles = defaultdict(list)
         gobjs = getattr(dobj._current_chunk, "objs", dobj._chunk_info)
         for subset in gobjs:
             yield YTDataChunk(dobj, "io", [subset],

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/athena/fields.py
--- a/yt/frontends/athena/fields.py
+++ b/yt/frontends/athena/fields.py
@@ -13,12 +13,10 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-import numpy as np
 from yt.fields.field_info_container import \
     FieldInfoContainer
 from yt.utilities.physical_constants import \
-    kboltz,mh
-from yt.units.yt_array import YTArray
+    kboltz, mh
 
 b_units = "code_magnetic"
 pres_units = "code_mass/(code_length*code_time**2)"

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/athena/io.py
--- a/yt/frontends/athena/io.py
+++ b/yt/frontends/athena/io.py
@@ -12,10 +12,11 @@
 #
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
+
 from yt.utilities.io_handler import \
-           BaseIOHandler
+    BaseIOHandler
 import numpy as np
-from yt.funcs import mylog, defaultdict
+from yt.funcs import mylog
 from .data_structures import chk23
 
 float_size = {"float":np.dtype(">f4").itemsize,

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/athena/setup.py
--- a/yt/frontends/athena/setup.py
+++ b/yt/frontends/athena/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/athena/tests/test_outputs.py
--- a/yt/frontends/athena/tests/test_outputs.py
+++ b/yt/frontends/athena/tests/test_outputs.py
@@ -13,11 +13,13 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.testing import *
+from yt.testing import \
+    assert_equal, \
+    requires_file, \
+    assert_allclose_units
 from yt.utilities.answer_testing.framework import \
     requires_ds, \
     small_patch_amr, \
-    big_patch_amr, \
     data_dir_load
 from yt.frontends.athena.api import AthenaDataset
 from yt.config import ytcfg

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/boxlib/data_structures.py
--- a/yt/frontends/boxlib/data_structures.py
+++ b/yt/frontends/boxlib/data_structures.py
@@ -13,6 +13,7 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
+import inspect
 import os
 import re
 
@@ -20,7 +21,9 @@
 
 import numpy as np
 
-from yt.funcs import *
+from yt.funcs import \
+    mylog, \
+    ensure_tuple
 from yt.data_objects.grid_patch import AMRGridPatch
 from yt.extern.six.moves import zip as izip
 from yt.geometry.grid_geometry_handler import GridIndex
@@ -188,7 +191,7 @@
             vals = next(header_file).split()
             lev, ngrids = int(vals[0]), int(vals[1])
             assert(lev == level)
-            nsteps = int(next(header_file))
+            nsteps = int(next(header_file))  # NOQA
             for gi in range(ngrids):
                 xlo, xhi = [float(v) for v in next(header_file).split()]
                 if self.dimensionality > 1:
@@ -211,7 +214,7 @@
             next(level_header_file)
             next(level_header_file)
             # Now we get the number of components
-            ncomp_this_file = int(next(level_header_file))
+            ncomp_this_file = int(next(level_header_file))  # NOQA
             # Skip the next line, which contains the number of ghost zones
             next(level_header_file)
             # To decipher this next line, we expect something like:
@@ -889,15 +892,16 @@
                   ['particle_velocity_%s' % ax for ax in 'xyz']:
             self.field_list.append(("io", fn))
         header = open(os.path.join(self.ds.output_dir, "DM", "Header"))
-        version = header.readline()
-        ndim = header.readline()
-        nfields = header.readline()
-        ntotalpart = int(header.readline())
-        dummy = header.readline() # nextid
-        maxlevel = int(header.readline()) # max level
+        version = header.readline()  # NOQA
+        ndim = header.readline()  # NOQA
+        nfields = header.readline()  # NOQA
+        ntotalpart = int(header.readline())  # NOQA
+        nextid = header.readline()  # NOQA
+        maxlevel = int(header.readline())  # NOQA
 
         # Skip over how many grids on each level; this is degenerate
-        for i in range(maxlevel + 1): dummy = header.readline()
+        for i in range(maxlevel + 1):
+            header.readline()
 
         grid_info = np.fromiter((int(i) for line in header.readlines()
                                  for i in line.split()),
@@ -972,8 +976,9 @@
 
 def _guess_pcast(vals):
     # Now we guess some things about the parameter and its type
-    v = vals.split()[0] # Just in case there are multiple; we'll go
-                        # back afterward to using vals.
+    # Just in case there are multiple; we'll go
+    # back afterward to using vals.
+    v = vals.split()[0]
     try:
         float(v.upper().replace("D", "E"))
     except:
@@ -986,6 +991,7 @@
             pcast = float
         else:
             pcast = int
-    vals = [pcast(v) for v in vals.split()]
-    if len(vals) == 1: vals = vals[0]
+    vals = [pcast(value) for value in vals.split()]
+    if len(vals) == 1:
+        vals = vals[0]
     return vals

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/boxlib/definitions.py
--- a/yt/frontends/boxlib/definitions.py
+++ b/yt/frontends/boxlib/definitions.py
@@ -12,7 +12,7 @@
 #
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
-from yt.funcs import *
+
 
 # TODO: get rid of enzo parameters we do not need
 parameterDict = {"CosmologyCurrentRedshift": float,

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/boxlib/fields.py
--- a/yt/frontends/boxlib/fields.py
+++ b/yt/frontends/boxlib/fields.py
@@ -184,9 +184,10 @@
                 if field[3] in string.ascii_letters:
                     element, weight = field[2:4], field[4:-1]
                 else:
-                    element, weight = field[2:3], field[3:-1]
+                    element, weight = field[2:3], field[3:-1]  # NOQA
 
-                # Here we can, later, add number density.
+                # Here we can, later, add number density
+                # right now element and weight inferred above are unused
 
 
 class MaestroFieldInfo(FieldInfoContainer):
@@ -280,10 +281,12 @@
                     if field[3] in string.ascii_letters:
                         element, weight = field[2:4], field[4:-1]
                     else:
-                        element, weight = field[2:3], field[3:-1]
+                        element, weight = field[2:3], field[3:-1]  # NOQA
                     weight = int(weight)
 
-                # Here we can, later, add number density.
+                # Here we can, later, add number density using 'element' and
+                # 'weight' inferred above
+
             elif field.startswith("omegadot("):
                 nice_name, tex_label = _nice_species_name(field)
                 display_name = r'\dot{\omega}\left[%s\right]' % tex_label

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/boxlib/io.py
--- a/yt/frontends/boxlib/io.py
+++ b/yt/frontends/boxlib/io.py
@@ -15,10 +15,8 @@
 
 import os
 import numpy as np
-from yt.utilities.lib.fortran_reader import \
-    read_castro_particles
 from yt.utilities.io_handler import \
-           BaseIOHandler
+    BaseIOHandler
 from yt.funcs import mylog, defaultdict
 from yt.frontends.chombo.io import parse_orion_sinks
 
@@ -156,37 +154,3 @@
                     line = lines[num]
                     particles.append(read(line, field))
             return np.array(particles)
-
-
-class IOHandlerCastro(IOHandlerBoxlib):
-    _dataset_type = "castro_native"
-
-    def _read_particle_field(self, grid, field):
-        offset = grid._particle_offset
-        filen = os.path.expanduser(grid.particle_filename)
-        off = grid._particle_offset
-        tr = np.zeros(grid.NumberOfParticles, dtype='float64')
-        read_castro_particles(filen, off,
-            castro_particle_field_names.index(field),
-            len(castro_particle_field_names),
-            tr)
-        return tr
-
-nyx_particle_field_names = ['particle_position_%s' % ax for ax in 'xyz'] + \
-                           ['particle_mass'] +  \
-                           ['particle_velocity_%s' % ax for ax in 'xyz']
-
-class IOHandlerNyx(IOHandlerBoxlib):
-    _dataset_type = "nyx_native"
-
-    def _read_particle_coords(self, chunks, ptf):
-        offset = grid._particle_offset
-        filen = os.path.expanduser(grid.particle_filename)
-        off = grid._particle_offset
-        tr = np.zeros(grid.NumberOfParticles, dtype='float64')
-        read_castro_particles(filen, off,
-                            nyx_particle_field_names.index(field),
-                            len(nyx_particle_field_names), tr)
-
-    def _read_particle_fields(self, chunks, ptf, fields):
-        pass

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/boxlib/setup.py
--- a/yt/frontends/boxlib/setup.py
+++ b/yt/frontends/boxlib/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/boxlib/tests/test_orion.py
--- a/yt/frontends/boxlib/tests/test_orion.py
+++ b/yt/frontends/boxlib/tests/test_orion.py
@@ -13,11 +13,13 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.testing import *
+from yt.testing import \
+    assert_equal, \
+    requires_file, \
+    units_override_check
 from yt.utilities.answer_testing.framework import \
     requires_ds, \
     small_patch_amr, \
-    big_patch_amr, \
     data_dir_load
 from yt.frontends.boxlib.api import OrionDataset
 

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/chombo/data_structures.py
--- a/yt/frontends/chombo/data_structures.py
+++ b/yt/frontends/chombo/data_structures.py
@@ -19,10 +19,11 @@
 import weakref
 import numpy as np
 
+from six import string_types
 from stat import \
     ST_CTIME
 
-from yt.funcs import *
+from yt.funcs import mylog
 from yt.data_objects.grid_patch import \
     AMRGridPatch
 from yt.extern import six
@@ -30,8 +31,6 @@
     GridIndex
 from yt.data_objects.static_output import \
     Dataset
-from yt.utilities.definitions import \
-    mpc_conversion, sec_conversion
 from yt.utilities.file_handler import \
     HDF5FileHandler
 from yt.utilities.parallel_tools.parallel_analysis_interface import \
@@ -108,9 +107,10 @@
         self.directory = ds.fullpath
         self._handle = ds._handle
 
-        tr = self._handle['Chombo_global'].attrs.get("testReal", "float32")
+        self._levels = [
+            key for key in self._handle.keys() if key.startswith('level')
+        ]
 
-        self._levels = [key for key in self._handle.keys() if key.startswith('level')]
         GridIndex.__init__(self, ds, dataset_type)
 
         self._read_particles()
@@ -650,7 +650,7 @@
         pluto_ini_file_exists = False
         orion2_ini_file_exists = False
 
-        if type(args[0]) == type(""):
+        if isinstance(args[0], string_types):
             dir_name = os.path.dirname(os.path.abspath(args[0]))
             pluto_ini_filename = os.path.join(dir_name, "pluto.ini")
             orion2_ini_filename = os.path.join(dir_name, "orion2.ini")

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/chombo/io.py
--- a/yt/frontends/chombo/io.py
+++ b/yt/frontends/chombo/io.py
@@ -182,9 +182,9 @@
         offsets = np.append(np.array([0]), offsets)
         offsets = np.array(offsets, dtype=np.int64)
 
-        # convert between the global grid id and the id on this level            
+        # convert between the global grid id and the id on this level
         grid_levels = np.array([g.Level for g in self.ds.index.grids])
-        grid_ids = np.array([g.id    for g in self.ds.index.grids])
+        grid_ids = np.array([g.id for g in self.ds.index.grids])
         grid_level_offset = grid_ids[np.where(grid_levels == grid.Level)[0][0]]
         lo = grid.id - grid_level_offset
         hi = lo + 1

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/chombo/setup.py
--- a/yt/frontends/chombo/setup.py
+++ b/yt/frontends/chombo/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/eagle/data_structures.py
--- a/yt/frontends/eagle/data_structures.py
+++ b/yt/frontends/eagle/data_structures.py
@@ -17,7 +17,6 @@
 
 from yt.utilities.on_demand_imports import _h5py as h5py
 import numpy as np
-import types
 
 from yt.frontends.gadget.data_structures import \
     GadgetHDF5Dataset

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/eagle/fields.py
--- a/yt/frontends/eagle/fields.py
+++ b/yt/frontends/eagle/fields.py
@@ -15,19 +15,12 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-import os
-import numpy as np
-
-from yt.funcs import *
-
-from yt.fields.field_info_container import \
-    FieldInfoContainer
 from yt.frontends.owls.fields import \
     OWLSFieldInfo
-import yt.frontends.owls.owls_ion_tables as oit
 from yt.units.yt_array import YTQuantity
+from yt.utilities.periodic_table import periodic_table
 
-from .definitions import \
+from yt.frontends.eagle.definitions import \
     eaglenetwork_ion_lookup
 
 class EagleNetworkFieldInfo(OWLSFieldInfo):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/eagle/setup.py
--- a/yt/frontends/eagle/setup.py
+++ b/yt/frontends/eagle/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/eagle/tests/test_outputs.py
--- a/yt/frontends/eagle/tests/test_outputs.py
+++ b/yt/frontends/eagle/tests/test_outputs.py
@@ -17,7 +17,6 @@
 from yt.testing import \
     requires_file
 from yt.utilities.answer_testing.framework import \
-    requires_ds, \
     data_dir_load
 from yt.frontends.eagle.api import EagleDataset
 

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/enzo/answer_testing_support.py
--- a/yt/frontends/enzo/answer_testing_support.py
+++ b/yt/frontends/enzo/answer_testing_support.py
@@ -13,20 +13,22 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.testing import *
+import numpy as np
+import os
+
+from functools import wraps
+
 from yt.config import ytcfg
-from yt.mods import *
-
+from yt.convenience import load
+from yt.testing import assert_allclose
 from yt.utilities.answer_testing.framework import \
-     AnswerTestingTest, \
-     can_run_ds, \
-     FieldValuesTest, \
-     GridHierarchyTest, \
-     GridValuesTest, \
-     ProjectionValuesTest, \
-     ParentageRelationshipsTest, \
-     temp_cwd, \
-     AssertWrapper
+    AnswerTestingTest, \
+    can_run_ds, \
+    FieldValuesTest, \
+    GridValuesTest, \
+    ProjectionValuesTest, \
+    temp_cwd, \
+    AssertWrapper
 
 def requires_outputlog(path = ".", prefix = ""):
     def ffalse(func):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/enzo/data_structures.py
--- a/yt/frontends/enzo/data_structures.py
+++ b/yt/frontends/enzo/data_structures.py
@@ -19,13 +19,16 @@
 import os
 import stat
 import string
+import time
 import re
 
-from threading import Thread
-
+from collections import defaultdict
 from yt.extern.six.moves import zip as izip
 
-from yt.funcs import *
+from yt.funcs import \
+    ensure_list, \
+    ensure_tuple, \
+    get_pbar
 from yt.config import ytcfg
 from yt.data_objects.grid_patch import \
     AMRGridPatch
@@ -36,20 +39,15 @@
 from yt.data_objects.static_output import \
     Dataset
 from yt.fields.field_info_container import \
-    FieldInfoContainer, NullFunc
-from yt.utilities.definitions import \
-    mpc_conversion, sec_conversion
+    NullFunc
 from yt.utilities.physical_constants import \
     rho_crit_g_cm3_h2, cm_per_mpc
-from yt.utilities.io_handler import io_registry
 from yt.utilities.logger import ytLogger as mylog
 from yt.utilities.pyparselibconfig import libconfig
 
 from .fields import \
     EnzoFieldInfo
 
-from yt.utilities.parallel_tools.parallel_analysis_interface import \
-    parallel_blocking_call
 
 class EnzoGrid(AMRGridPatch):
     """
@@ -77,7 +75,6 @@
         """
         rf = self.ds.refine_by
         my_ind = self.id - self._id_offset
-        le = self.LeftEdge
         self.dds = self.Parent.dds/rf
         ParentLeftIndex = np.rint((self.LeftEdge-self.Parent.LeftEdge)/self.Parent.dds)
         self.start_index = rf*(ParentLeftIndex + self.Parent.get_global_startindex()).astype('int64')
@@ -148,12 +145,9 @@
         # We will attempt this by creating a datacube that is exactly bigger
         # than the grid by nZones*dx in each direction
         nl = self.get_global_startindex() - n_zones
-        nr = nl + self.ActiveDimensions + 2*n_zones
         new_left_edge = nl * self.dds + self.ds.domain_left_edge
-        new_right_edge = nr * self.dds + self.ds.domain_left_edge
         # Something different needs to be done for the root grid, though
         level = self.Level
-        args = (level, new_left_edge, new_right_edge)
         kwargs = {'dims': self.ActiveDimensions + 2*n_zones,
                   'num_ghost_zones':n_zones,
                   'use_pbar':False}
@@ -197,7 +191,7 @@
     def __init__(self, ds, dataset_type):
 
         self.dataset_type = dataset_type
-        if ds.file_style != None:
+        if ds.file_style is not None:
             self._bn = ds.file_style
         else:
             self._bn = "%s.cpu%%04i"
@@ -268,14 +262,12 @@
             for line in f:
                 if line.startswith(token):
                     return line.split()[2:]
-        t1 = time.time()
         pattern = r"Pointer: Grid\[(\d*)\]->NextGrid(Next|This)Level = (\d*)\s+$"
         patt = re.compile(pattern)
         f = open(self.index_filename, "rt")
         self.grids = [self.grid(1, self)]
         self.grids[0].Level = 0
         si, ei, LE, RE, fn, npart = [], [], [], [], [], []
-        all = [si, ei, LE, RE, fn]
         pbar = get_pbar("Parsing Hierarchy ", self.num_grids)
         version = self.dataset.parameters.get("VersionNumber", None)
         params = self.dataset.parameters
@@ -326,7 +318,6 @@
         temp_grids[:] = self.grids
         self.grids = temp_grids
         self.filenames = fn
-        t2 = time.time()
 
     def _initialize_grid_arrays(self):
         super(EnzoHierarchy, self)._initialize_grid_arrays()
@@ -403,7 +394,7 @@
         fields = []
         for ptype in self.dataset["AppendActiveParticleType"]:
             select_grids = self.grid_active_particle_count[ptype].flat
-            if np.any(select_grids) == False:
+            if np.any(select_grids) is False:
                 current_ptypes = self.dataset.particle_types
                 new_ptypes = [p for p in current_ptypes if p != ptype]
                 self.dataset.particle_types = new_ptypes
@@ -1027,7 +1018,8 @@
                 self.hubble_constant = self.cosmological_simulation = 0.0
 
     def _obtain_enzo(self):
-        import enzo; return enzo
+        import enzo
+        return enzo
 
     @classmethod
     def _is_valid(cls, *args, **kwargs):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/enzo/fields.py
--- a/yt/frontends/enzo/fields.py
+++ b/yt/frontends/enzo/fields.py
@@ -13,16 +13,11 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-import numpy as np
-
-from yt.funcs import mylog
 from yt.fields.field_info_container import \
     FieldInfoContainer
-from yt.units.yt_array import \
-    YTArray
 from yt.utilities.physical_constants import \
-    mh, me, mp, \
-    mass_sun_cgs
+    me, \
+    mp
 
 b_units = "code_magnetic"
 ra_units = "code_length / code_time**2"

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/enzo/io.py
--- a/yt/frontends/enzo/io.py
+++ b/yt/frontends/enzo/io.py
@@ -13,19 +13,18 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-import os
 import random
 from contextlib import contextmanager
 
 from yt.utilities.io_handler import \
-    BaseIOHandler, _axis_ids
+    BaseIOHandler
 from yt.utilities.logger import ytLogger as mylog
-from yt.geometry.selection_routines import mask_fill, AlwaysSelector
+from yt.geometry.selection_routines import AlwaysSelector
 from yt.extern.six import u, b, iteritems
 from yt.utilities.on_demand_imports import _h5py as h5py
 
 import numpy as np
-from yt.funcs import *
+
 
 _convert_mass = ("particle_mass","mass")
 
@@ -305,7 +304,7 @@
     _dataset_type = "enzo_packed_3d_gz"
 
     def __init__(self, *args, **kwargs):
-        super(IOHandlerPackgedHDF5GhostZones, self).__init__(*args, **kwargs)
+        super(IOHandlerPackedHDF5GhostZones, self).__init__(*args, **kwargs)
         NGZ = self.ds.parameters.get("NumberOfGhostZones", 3)
         self._base = (slice(NGZ, -NGZ),
                       slice(NGZ, -NGZ),
@@ -357,7 +356,8 @@
                 raise RuntimeError
             g = chunks[0].objs[0]
             for ftype, fname in fields:
-                rv[(ftype, fname)] = self.grids_in_memory[grid.id][fname].swapaxes(0,2)
+                rv[(ftype, fname)] = \
+                    self.grids_in_memory[g.id][fname].swapaxes(0, 2)
             return rv
         if size is None:
             size = sum((g.count(selector) for chunk in chunks

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/enzo/setup.py
--- a/yt/frontends/enzo/setup.py
+++ b/yt/frontends/enzo/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/enzo/simulation_handling.py
--- a/yt/frontends/enzo/simulation_handling.py
+++ b/yt/frontends/enzo/simulation_handling.py
@@ -17,6 +17,8 @@
 import glob
 import os
 
+from math import ceil
+
 from yt.convenience import \
     load, \
     only_on_root
@@ -26,13 +28,14 @@
 from yt.units.unit_registry import \
     UnitRegistry
 from yt.units.yt_array import \
-    YTArray, YTQuantity
+    YTArray
 from yt.utilities.cosmology import \
     Cosmology
 from yt.utilities.exceptions import \
     InvalidSimulationTimeSeries, \
     MissingParameter, \
-    NoStoppingCondition
+    NoStoppingCondition, \
+    YTOutputNotIdentified
 from yt.utilities.logger import ytLogger as \
     mylog
 from yt.utilities.parallel_tools.parallel_analysis_interface import \
@@ -385,7 +388,7 @@
                           'final_redshift': 'CosmologyFinalRedshift'}
             self.cosmological_simulation = 1
             for a, v in cosmo_attr.items():
-                if not v in self.parameters:
+                if v not in self.parameters:
                     raise MissingParameter(self.parameter_filename, v)
                 setattr(self, a, self.parameters[v])
         else:
@@ -412,7 +415,7 @@
 
         self.all_time_outputs = []
         if self.final_time is None or \
-            not 'dtDataDump' in self.parameters or \
+            'dtDataDump' not in self.parameters or \
             self.parameters['dtDataDump'] <= 0.0: return []
 
         index = 0
@@ -441,7 +444,7 @@
         mylog.warn('Calculating cycle outputs.  Dataset times will be unavailable.')
 
         if self.stop_cycle is None or \
-            not 'CycleSkipDataDump' in self.parameters or \
+            'CycleSkipDataDump' not in self.parameters or \
             self.parameters['CycleSkipDataDump'] <= 0.0: return []
 
         self.all_time_outputs = []
@@ -623,7 +626,6 @@
         mylog.info("Writing redshift output list to %s.", filename)
         f = open(filename, 'w')
         for q, output in enumerate(outputs):
-            z_string = "%%s[%%d] = %%.%df" % decimals
             f.write(("CosmologyOutputRedshift[%d] = %."
                      + str(decimals) + "f\n") %
                     ((q + start_index), output['redshift']))

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/enzo/tests/test_outputs.py
--- a/yt/frontends/enzo/tests/test_outputs.py
+++ b/yt/frontends/enzo/tests/test_outputs.py
@@ -13,7 +13,14 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.testing import *
+import numpy as np
+
+from yt.testing import \
+    assert_almost_equal, \
+    assert_equal, \
+    requires_file, \
+    units_override_check, \
+    assert_array_equal
 from yt.utilities.answer_testing.framework import \
     requires_ds, \
     small_patch_amr, \
@@ -41,12 +48,12 @@
     dd = ds.all_data()
     dens_enzo = dd["Density"].copy()
     for f in sorted(ds.field_list):
-        if not f[1].endswith("_Density") or \
-               f[1].startswith("Dark_Matter_")  or \
-               f[1].startswith("Electron_") or \
-               f[1].startswith("SFR_") or \
-               f[1].startswith("Forming_Stellar_") or \
-               f[1].startswith("Star_Particle_"):
+        ff = f[1]
+        if not ff.endswith("_Density"):
+            continue
+        start_strings = ["Electron_", "SFR_", "Forming_Stellar_",
+                         "Dark_Matter", "Star_Particle_"]
+        if any([ff.startswith(ss) for ss in start_strings]):
             continue
         dens_enzo -= dd[f]
     delta_enzo = np.abs(dens_enzo / dd["Density"])

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/fits/data_structures.py
--- a/yt/frontends/fits/data_structures.py
+++ b/yt/frontends/fits/data_structures.py
@@ -11,17 +11,22 @@
 #-----------------------------------------------------------------------------
 
 import stat
-import types
 import numpy as np
 import numpy.core.defchararray as np_char
+import os
+import re
+import time
+import uuid
 import weakref
 import warnings
-import re
-import uuid
 
-from yt.extern.six import iteritems
+
+from collections import defaultdict
+
 from yt.config import ytcfg
-from yt.funcs import *
+from yt.funcs import \
+    mylog, \
+    ensure_list
 from yt.data_objects.grid_patch import \
     AMRGridPatch
 from yt.geometry.grid_geometry_handler import \
@@ -42,7 +47,6 @@
     prefixable_units, \
     unit_prefixes
 from yt.units import dimensions
-from yt.units.yt_array import YTQuantity
 from yt.utilities.on_demand_imports import _astropy, NotAModule
 
 
@@ -137,10 +141,10 @@
                 mylog.info("Adding field %s to the list of fields." % (fname))
                 self.field_list.append(("io",fname))
                 if k in ["x","y"]:
-                    unit = "code_length"
+                    field_unit = "code_length"
                 else:
-                    unit = v
-                self.dataset.field_units[("io",fname)] = unit
+                    field_unit = v
+                self.dataset.field_units[("io",fname)] = field_unit
             return
         self._axis_map = {}
         self._file_map = {}
@@ -149,7 +153,9 @@
         dup_field_index = {}
         # Since FITS header keywords are case-insensitive, we only pick a subset of
         # prefixes, ones that we expect to end up in headers.
-        known_units = dict([(unit.lower(),unit) for unit in self.ds.unit_registry.lut])
+        known_units = dict(
+            [(unit.lower(), unit) for unit in self.ds.unit_registry.lut]
+        )
         for unit in list(known_units.values()):
             if unit in prefixable_units:
                 for p in ["n","u","m","c","k"]:
@@ -211,8 +217,7 @@
         self.num_grids = self.ds.parameters["nprocs"]
 
     def _parse_index(self):
-        f = self._handle # shortcut
-        ds = self.dataset # shortcut
+        ds = self.dataset
 
         # If nprocs > 1, decompose the domain into virtual grids
         if self.num_grids > 1:

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/fits/fields.py
--- a/yt/frontends/fits/fields.py
+++ b/yt/frontends/fits/fields.py
@@ -10,8 +10,6 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-import numpy as np
-from yt.utilities.exceptions import *
 from yt.fields.field_info_container import \
     FieldInfoContainer
 

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/fits/misc.py
--- a/yt/frontends/fits/misc.py
+++ b/yt/frontends/fits/misc.py
@@ -14,8 +14,8 @@
 import base64
 from yt.extern.six import PY3
 from yt.fields.derived_field import ValidateSpatial
+from yt.funcs import mylog
 from yt.utilities.on_demand_imports import _astropy
-from yt.funcs import mylog, get_image_suffix
 from yt.visualization._mpl_imports import FigureCanvasAgg
 from yt.units.yt_array import YTQuantity, YTArray
 from yt.utilities.fits_image import FITSImageData
@@ -23,7 +23,7 @@
     from io import BytesIO as IO
 else:
     from yt.extern.six.moves import StringIO as IO
-    
+
 import os
 
 def _make_counts(emin, emax):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/fits/setup.py
--- a/yt/frontends/fits/setup.py
+++ b/yt/frontends/fits/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/fits/tests/test_outputs.py
--- a/yt/frontends/fits/tests/test_outputs.py
+++ b/yt/frontends/fits/tests/test_outputs.py
@@ -13,7 +13,10 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.testing import *
+from yt.testing import \
+    assert_equal, \
+    requires_file, \
+    units_override_check
 from yt.utilities.answer_testing.framework import \
     requires_ds, \
     small_patch_amr, \

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/flash/data_structures.py
--- a/yt/frontends/flash/data_structures.py
+++ b/yt/frontends/flash/data_structures.py
@@ -13,27 +13,20 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.utilities.on_demand_imports import _h5py as h5py
+import os
 import stat
 import numpy as np
 import weakref
 
-from yt.config import ytcfg
-from yt.funcs import *
+from yt.funcs import mylog
 from yt.data_objects.grid_patch import \
     AMRGridPatch
 from yt.geometry.grid_geometry_handler import \
     GridIndex
-from yt.geometry.geometry_handler import \
-    YTDataChunk
 from yt.data_objects.static_output import \
     Dataset
-from yt.utilities.definitions import \
-    mpc_conversion, sec_conversion
 from yt.utilities.file_handler import \
     HDF5FileHandler
-from yt.utilities.io_handler import \
-    io_registry
 from yt.utilities.physical_constants import cm_per_mpc
 from .fields import FLASHFieldInfo
 
@@ -71,7 +64,6 @@
         pass
 
     def _detect_output_fields(self):
-        ncomp = self._handle["/unknown names"].shape[0]
         self.field_list = [("flash", s.decode("ascii","ignore"))
                            for s in self._handle["/unknown names"][:].flat]
         if ("/particle names" in self._particle_handle):
@@ -159,9 +151,6 @@
             gre[i][:ND] = np.rint(gre[i][:ND]/dx[0][:ND])*dx[0][:ND]
 
     def _populate_grid_objects(self):
-        # We only handle 3D data, so offset is 7 (nfaces+1)
-        
-        offset = 7
         ii = np.argsort(self.grid_levels.flat)
         gid = self._handle["/gid"][:]
         first_ind = -(self.dataset.refine_by**self.dataset.dimensionality)

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/flash/fields.py
--- a/yt/frontends/flash/fields.py
+++ b/yt/frontends/flash/fields.py
@@ -13,13 +13,10 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-import numpy as np
 from yt.fields.field_info_container import \
     FieldInfoContainer
 from yt.utilities.physical_constants import \
-    kboltz, mh, Na
-from yt.units.yt_array import \
-    YTArray
+    Na
 
 # Common fields in FLASH: (Thanks to John ZuHone for this list)
 #

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/flash/io.py
--- a/yt/frontends/flash/io.py
+++ b/yt/frontends/flash/io.py
@@ -14,8 +14,6 @@
 #-----------------------------------------------------------------------------
 
 import numpy as np
-from yt.utilities.on_demand_imports import _h5py as h5py
-from yt.utilities.math_utils import prec_accum
 from itertools import groupby
 
 from yt.utilities.io_handler import \
@@ -110,7 +108,6 @@
         rv = {}
         for field in fields:
             ftype, fname = field
-            dt = f["/%s" % fname].dtype
             # Always use *native* 64-bit float.
             rv[field] = np.empty(size, dtype="=f8")
         ng = sum(len(c.objs) for c in chunks)
@@ -149,7 +146,6 @@
         for field in fluid_fields:
             ftype, fname = field
             ds = f["/%s" % fname]
-            ind = 0
             for gs in grid_sequences(chunk.objs):
                 start = gs[0].id - gs[0]._id_offset
                 end = gs[-1].id - gs[-1]._id_offset + 1

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/flash/setup.py
--- a/yt/frontends/flash/setup.py
+++ b/yt/frontends/flash/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/flash/tests/test_outputs.py
--- a/yt/frontends/flash/tests/test_outputs.py
+++ b/yt/frontends/flash/tests/test_outputs.py
@@ -13,11 +13,13 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.testing import *
+from yt.testing import \
+    assert_equal, \
+    requires_file, \
+    units_override_check
 from yt.utilities.answer_testing.framework import \
     requires_ds, \
     small_patch_amr, \
-    big_patch_amr, \
     data_dir_load
 from yt.frontends.flash.api import FLASHDataset
 

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/gadget/data_structures.py
--- a/yt/frontends/gadget/data_structures.py
+++ b/yt/frontends/gadget/data_structures.py
@@ -20,7 +20,6 @@
 import stat
 import struct
 import os
-import types
 
 from yt.data_objects.static_output import \
     ParticleFile
@@ -30,8 +29,6 @@
     ParticleIndex
 from yt.utilities.cosmology import \
     Cosmology
-from yt.utilities.definitions import \
-    sec_conversion
 from yt.utilities.fortran_utils import read_record
 from yt.utilities.logger import ytLogger as mylog
 

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/gadget/setup.py
--- a/yt/frontends/gadget/setup.py
+++ b/yt/frontends/gadget/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/gadget/simulation_handling.py
--- a/yt/frontends/gadget/simulation_handling.py
+++ b/yt/frontends/gadget/simulation_handling.py
@@ -26,13 +26,15 @@
 from yt.units.unit_registry import \
     UnitRegistry
 from yt.units.yt_array import \
-    YTArray, YTQuantity
+    YTArray
 from yt.utilities.cosmology import \
     Cosmology
 from yt.utilities.exceptions import \
     InvalidSimulationTimeSeries, \
     MissingParameter, \
     NoStoppingCondition
+from yt.utilities.exceptions import \
+    YTOutputNotIdentified
 from yt.utilities.logger import ytLogger as \
     mylog
 from yt.utilities.parallel_tools.parallel_analysis_interface import \
@@ -328,7 +330,7 @@
             self.final_redshift = 1.0 / self.parameters["TimeMax"] - 1.0
             self.cosmological_simulation = 1
             for a, v in cosmo_attr.items():
-                if not v in self.parameters:
+                if v not in self.parameters:
                     raise MissingParameter(self.parameter_filename, v)
                 setattr(self, a, self.parameters[v])
         else:
@@ -426,7 +428,7 @@
                 self.final_time = self.quan(self.parameters["TimeMax"], "code_time")
             else:
                 self.final_time = None
-            if not "TimeMax" in self.parameters:
+            if "TimeMax" not in self.parameters:
                 raise NoStoppingCondition(self.parameter_filename)
 
     def _find_outputs(self):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/gadget_fof/data_structures.py
--- a/yt/frontends/gadget_fof/data_structures.py
+++ b/yt/frontends/gadget_fof/data_structures.py
@@ -18,19 +18,14 @@
 from yt.utilities.on_demand_imports import _h5py as h5py
 import numpy as np
 import stat
-import weakref
-import struct
 import glob
-import time
 import os
 
-from .fields import \
+from yt.frontends.gadget_fof.fields import \
     GadgetFOFFieldInfo
 
 from yt.utilities.cosmology import \
     Cosmology
-from yt.utilities.definitions import \
-    mpc_conversion, sec_conversion
 from yt.utilities.exceptions import \
     YTException
 from yt.utilities.logger import ytLogger as \
@@ -42,10 +37,7 @@
     ParticleFile
 from yt.frontends.gadget.data_structures import \
     _fix_unit_ordering
-import yt.utilities.fortran_utils as fpu
-from yt.units.yt_array import \
-    YTArray, \
-    YTQuantity
+
 
 class GadgetFOFParticleIndex(ParticleIndex):
     def __init__(self, ds, dataset_type):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/gadget_fof/fields.py
--- a/yt/frontends/gadget_fof/fields.py
+++ b/yt/frontends/gadget_fof/fields.py
@@ -14,11 +14,8 @@
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
-from yt.funcs import mylog
 from yt.fields.field_info_container import \
     FieldInfoContainer
-from yt.units.yt_array import \
-    YTArray
 
 m_units = "code_mass"
 p_units = "code_length"

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/gadget_fof/io.py
--- a/yt/frontends/gadget_fof/io.py
+++ b/yt/frontends/gadget_fof/io.py
@@ -17,7 +17,7 @@
 from yt.utilities.on_demand_imports import _h5py as h5py
 import numpy as np
 
-from yt.utilities.exceptions import *
+from yt.utilities.exceptions import YTDomainOverflow
 from yt.funcs import mylog
 
 from yt.utilities.io_handler import \

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/gadget_fof/setup.py
--- a/yt/frontends/gadget_fof/setup.py
+++ b/yt/frontends/gadget_fof/setup.py
@@ -1,8 +1,4 @@
 #!/usr/bin/env python
-import setuptools
-import os
-import sys
-import os.path
 
 
 def configuration(parent_package='', top_path=None):

diff -r b4941cba3982e6eddba1aba16e8d458f9de6980c -r 03e316bc6fddecfb4705d0f73754ce2553e45a3d yt/frontends/gdf/data_structures.py
--- a/yt/frontends/gdf/data_structures.py
+++ b/yt/frontends/gdf/data_structures.py
@@ -14,7 +14,6 @@
 #-----------------------------------------------------------------------------
 
 from yt.utilities.on_demand_imports import _h5py as h5py
-import types
 import numpy as np
 import weakref
 import os

This diff is so big that we needed to truncate the remainder.

Repository URL: https://bitbucket.org/yt_analysis/yt/

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