[yt-svn] commit/yt: 10 new changesets
commits-noreply at bitbucket.org
commits-noreply at bitbucket.org
Mon Sep 14 20:54:54 PDT 2015
10 new commits in yt:
https://bitbucket.org/yt_analysis/yt/commits/8590c171cfa2/
Changeset: 8590c171cfa2
Branch: yt
User: nmearl
Date: 2015-07-30 20:27:56+00:00
Summary: Generalizing Tipsy reader to accept cosmological Gadget outputs
Affected #: 1 file
diff -r b35ac81530d482ef95fd62caec0c018207a41b47 -r 8590c171cfa252bf631362621e0becc13b0b7a94 yt/frontends/tipsy/data_structures.py
--- a/yt/frontends/tipsy/data_structures.py
+++ b/yt/frontends/tipsy/data_structures.py
@@ -167,9 +167,9 @@
self.domain_dimensions = np.ones(3, "int32") * nz
periodic = self.parameters.get('bPeriodic', True)
period = self.parameters.get('dPeriod', None)
- comoving = self.parameters.get('bComove', False)
self.periodicity = (periodic, periodic, periodic)
- if comoving and period is None:
+ self.comoving = self.parameters.get('bComove', False)
+ if self.comoving and period is None:
period = 1.0
if self.bounding_box is None:
if periodic and period is not None:
@@ -186,7 +186,9 @@
self.domain_left_edge = bbox[:,0]
self.domain_right_edge = bbox[:,1]
- if comoving:
+ # If the cosmology parameters dictionary got set when data is
+ # loaded, we can assume it's a cosmological data set
+ if self.comoving or self._cosmology_parameters is not None:
cosm = self._cosmology_parameters or {}
self.scale_factor = hvals["time"]#In comoving simulations, time stores the scale factor a
self.cosmological_simulation = 1
@@ -224,8 +226,12 @@
self.length_unit = self.quan(lu, 'kpc')*self.scale_factor
self.mass_unit = self.quan(mu, 'Msun')
density_unit = self.mass_unit/ (self.length_unit/self.scale_factor)**3
- # Gasoline's hubble constant, dHubble0, is stored units of proper code time.
- self.hubble_constant *= np.sqrt(G.in_units('kpc**3*Msun**-1*s**-2')*density_unit).value/(3.2407793e-18)
+
+ # If self.comoving is set, we know this is a gasoline data set,
+ # and we do the conversion on the hubble constant.
+ if self.comoving:
+ # Gasoline's hubble constant, dHubble0, is stored units of proper code time.
+ self.hubble_constant *= np.sqrt(G.in_units('kpc**3*Msun**-1*s**-2')*density_unit).value/(3.2407793e-18)
cosmo = Cosmology(self.hubble_constant,
self.omega_matter, self.omega_lambda)
self.current_time = cosmo.hubble_time(self.current_redshift)
https://bitbucket.org/yt_analysis/yt/commits/8c9cac3876f9/
Changeset: 8c9cac3876f9
Branch: yt
User: nmearl
Date: 2015-07-31 14:42:41+00:00
Summary: Fixed bug wherein unit_base was not working for Tipsy frontend
Affected #: 1 file
diff -r 8590c171cfa252bf631362621e0becc13b0b7a94 -r 8c9cac3876f977a94c3c64ef8195a64f81d06d5f yt/frontends/tipsy/data_structures.py
--- a/yt/frontends/tipsy/data_structures.py
+++ b/yt/frontends/tipsy/data_structures.py
@@ -32,6 +32,7 @@
from yt.utilities.physical_constants import \
G, \
cm_per_kpc
+from yt import YTQuantity
from .fields import \
TipsyFieldInfo
@@ -230,8 +231,11 @@
# If self.comoving is set, we know this is a gasoline data set,
# and we do the conversion on the hubble constant.
if self.comoving:
- # Gasoline's hubble constant, dHubble0, is stored units of proper code time.
- self.hubble_constant *= np.sqrt(G.in_units('kpc**3*Msun**-1*s**-2')*density_unit).value/(3.2407793e-18)
+ # Gasoline's hubble constant, dHubble0, is stored units of
+ # proper code time.
+ self.hubble_constant *= np.sqrt(G.in_units(
+ 'kpc**3*Msun**-1*s**-2') * density_unit).value / (
+ 3.2407793e-18)
cosmo = Cosmology(self.hubble_constant,
self.omega_matter, self.omega_lambda)
self.current_time = cosmo.hubble_time(self.current_redshift)
@@ -243,6 +247,32 @@
density_unit = self.mass_unit / self.length_unit**3
self.time_unit = 1.0 / np.sqrt(G * density_unit)
+ # If unit base is defined by the user, override all relevant units
+ if self._unit_base is not None:
+ if 'time' in self._unit_base.keys():
+ time = self._unit_base['time']
+
+ if not isinstance(time, YTQuantity):
+ time = self.quan(*time)
+
+ self.time_unit = time
+
+ if 'length' in self._unit_base.keys():
+ length = self._unit_base['length']
+
+ if not isinstance(length, YTQuantity):
+ length = self.quan(*length)
+
+ self.length_unit = length
+
+ if 'mass' in self._unit_base.keys():
+ mass = self._unit_base['mass']
+
+ if not isinstance(mass, YTQuantity):
+ mass = self.quan(*mass)
+
+ self.mass_unit = mass
+
@staticmethod
def _validate_header(filename):
'''
https://bitbucket.org/yt_analysis/yt/commits/fdf5b1060ff4/
Changeset: fdf5b1060ff4
Branch: yt
User: nmearl
Date: 2015-07-31 14:44:28+00:00
Summary: Updated documentation for Tipsy frontend
Affected #: 1 file
diff -r 8c9cac3876f977a94c3c64ef8195a64f81d06d5f -r fdf5b1060ff48f7815e6627491bcf40113d57d5a doc/source/examining/loading_data.rst
--- a/doc/source/examining/loading_data.rst
+++ b/doc/source/examining/loading_data.rst
@@ -1257,8 +1257,8 @@
.. _specifying-cosmology-tipsy:
-Specifying Tipsy Cosmological Parameters
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Specifying Tipsy Cosmological Parameters and Setting Default Units
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cosmological parameters can be specified to Tipsy to enable computation of
default units. The parameters recognized are of this form:
@@ -1270,5 +1270,25 @@
'omega_matter': 0.272,
'hubble_constant': 0.702}
-These will be used set the units, if they are specified.
+If you wish to set the default units directly, you can do so by using the ``unit_base`` keyword in the load statement.
+ .. code-block:: python
+
+ import yt
+ ds = yt.load(filename, unit_base={'length', (1.0, 'Mpc')})
+
+
+Loading Cosmological Simulations
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If you are not using a parameter file (i.e. non-Gasoline users), then you must use keyword ``cosmology_parameters``
+when loading your data set to indicate to yt that it is a cosmological data set. If you do not wish to set any
+non-default cosmological parameters, you may pass an empty dictionary.
+
+ .. code-block:: python
+
+ import yt
+ ds = yt.load(filename, cosmology_parameters={})
+
+
+
https://bitbucket.org/yt_analysis/yt/commits/0c5ceb9c7ea0/
Changeset: 0c5ceb9c7ea0
Branch: yt
User: nmearl
Date: 2015-07-31 14:51:29+00:00
Summary: Merging
Affected #: 2 files
diff -r fdf5b1060ff48f7815e6627491bcf40113d57d5a -r 0c5ceb9c7ea0ed164bff2ba41ef00f97820615f8 yt/units/tests/test_ytarray.py
--- a/yt/units/tests/test_ytarray.py
+++ b/yt/units/tests/test_ytarray.py
@@ -631,7 +631,7 @@
# In-place copies do not drop units.
assert_true(hasattr(out, 'units'))
assert_true(not hasattr(ret, 'units'))
- elif ufunc in (np.absolute, np.conjugate, np.floor, np.ceil,
+ elif ufunc in (np.absolute, np.fabs, np.conjugate, np.floor, np.ceil,
np.trunc, np.negative):
ret = ufunc(a, out=out)
diff -r fdf5b1060ff48f7815e6627491bcf40113d57d5a -r 0c5ceb9c7ea0ed164bff2ba41ef00f97820615f8 yt/units/yt_array.py
--- a/yt/units/yt_array.py
+++ b/yt/units/yt_array.py
@@ -26,7 +26,7 @@
greater, greater_equal, less, less_equal, not_equal, equal, logical_and, \
logical_or, logical_xor, logical_not, maximum, minimum, isreal, iscomplex, \
isfinite, isinf, isnan, signbit, copysign, nextafter, modf, frexp, \
- floor, ceil, trunc, fmax, fmin
+ floor, ceil, trunc, fmax, fmin, fabs
from yt.units.unit_object import Unit, UnitParseError
from yt.units.unit_registry import UnitRegistry
@@ -139,7 +139,7 @@
log10, expm1, log1p, sqrt, square, reciprocal, sin, cos, tan, arcsin,
arccos, arctan, sinh, cosh, tanh, arcsinh, arccosh, arctanh, deg2rad,
rad2deg, logical_not, isreal, iscomplex, isfinite, isinf, isnan,
- signbit, floor, ceil, trunc, modf, frexp,
+ signbit, floor, ceil, trunc, modf, frexp, fabs
)
binary_operators = (
@@ -223,6 +223,7 @@
mod: preserve_units,
fmod: preserve_units,
absolute: passthrough_unit,
+ fabs: passthrough_unit,
rint: return_without_unit,
sign: return_without_unit,
conj: passthrough_unit,
@@ -1072,7 +1073,8 @@
unit.base_value, out=out_arr)
unit = Unit(registry=unit.registry)
else:
- raise RuntimeError("Operation is not defined.")
+ raise RuntimeError("Support for the %s ufunc has not been added "
+ "to YTArray." % str(context[0]))
if unit is None:
out_arr = np.array(out_arr, copy=False)
return out_arr
https://bitbucket.org/yt_analysis/yt/commits/8d11841d8d22/
Changeset: 8d11841d8d22
Branch: yt
User: nmearl
Date: 2015-07-31 17:38:46+00:00
Summary: Fixed issue wherein time_unit was not accounting for unit_base values
Affected #: 1 file
diff -r 0c5ceb9c7ea0ed164bff2ba41ef00f97820615f8 -r 8d11841d8d22dcc01a69fb4da87512748b76ccf4 yt/frontends/tipsy/data_structures.py
--- a/yt/frontends/tipsy/data_structures.py
+++ b/yt/frontends/tipsy/data_structures.py
@@ -249,14 +249,6 @@
# If unit base is defined by the user, override all relevant units
if self._unit_base is not None:
- if 'time' in self._unit_base.keys():
- time = self._unit_base['time']
-
- if not isinstance(time, YTQuantity):
- time = self.quan(*time)
-
- self.time_unit = time
-
if 'length' in self._unit_base.keys():
length = self._unit_base['length']
@@ -273,6 +265,18 @@
self.mass_unit = mass
+ density_unit = self.mass_unit / self.length_unit**3
+ self.time_unit = 1.0 / np.sqrt(G * density_unit)
+
+ if 'time' in self._unit_base.keys():
+ time = self._unit_base['time']
+
+ if not isinstance(time, YTQuantity):
+ time = self.quan(*time)
+
+ self.time_unit = time
+
+
@staticmethod
def _validate_header(filename):
'''
https://bitbucket.org/yt_analysis/yt/commits/6ac625090a8d/
Changeset: 6ac625090a8d
Branch: yt
User: nmearl
Date: 2015-08-14 17:26:44+00:00
Summary: Condensed unit override; cosmological runs now indicated explicity in parameters dictionary
Affected #: 2 files
diff -r 8d11841d8d22dcc01a69fb4da87512748b76ccf4 -r 6ac625090a8d42e18b624e6b70a4b56cad4095cf doc/source/examining/loading_data.rst
--- a/doc/source/examining/loading_data.rst
+++ b/doc/source/examining/loading_data.rst
@@ -1270,7 +1270,8 @@
'omega_matter': 0.272,
'hubble_constant': 0.702}
-If you wish to set the default units directly, you can do so by using the ``unit_base`` keyword in the load statement.
+If you wish to set the default units directly, you can do so by using the
+``unit_base`` keyword in the load statement.
.. code-block:: python
@@ -1281,14 +1282,15 @@
Loading Cosmological Simulations
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-If you are not using a parameter file (i.e. non-Gasoline users), then you must use keyword ``cosmology_parameters``
-when loading your data set to indicate to yt that it is a cosmological data set. If you do not wish to set any
-non-default cosmological parameters, you may pass an empty dictionary.
+If you are not using a parameter file (i.e. non-Gasoline users), then you must
+use keyword ``cosmology_parameters`` when loading your data set to indicate to
+yt that it is a cosmological data set. In addition, you must supply the
+``cosmology_parameters`` dictionary with the key ``'cosmological'`` set to ``True``.
.. code-block:: python
import yt
- ds = yt.load(filename, cosmology_parameters={})
+ ds = yt.load(filename, cosmology_parameters={'cosmological': True})
diff -r 8d11841d8d22dcc01a69fb4da87512748b76ccf4 -r 6ac625090a8d42e18b624e6b70a4b56cad4095cf yt/frontends/tipsy/data_structures.py
--- a/yt/frontends/tipsy/data_structures.py
+++ b/yt/frontends/tipsy/data_structures.py
@@ -189,7 +189,8 @@
# If the cosmology parameters dictionary got set when data is
# loaded, we can assume it's a cosmological data set
- if self.comoving or self._cosmology_parameters is not None:
+ if self.comoving or self._cosmology_parameters is not None and \
+ self._cosmology_parameters.get('cosmological', None) is True:
cosm = self._cosmology_parameters or {}
self.scale_factor = hvals["time"]#In comoving simulations, time stores the scale factor a
self.cosmological_simulation = 1
@@ -249,32 +250,20 @@
# If unit base is defined by the user, override all relevant units
if self._unit_base is not None:
- if 'length' in self._unit_base.keys():
- length = self._unit_base['length']
+ length = self._unit_base.get('length', self.length_unit)
+ length = self.quan(*length) if isinstance(length, tuple) else self.quan(length)
+ self.length_unit = length
- if not isinstance(length, YTQuantity):
- length = self.quan(*length)
-
- self.length_unit = length
-
- if 'mass' in self._unit_base.keys():
- mass = self._unit_base['mass']
-
- if not isinstance(mass, YTQuantity):
- mass = self.quan(*mass)
-
- self.mass_unit = mass
+ mass = self._unit_base.get('mass', self.mass_unit)
+ mass = self.quan(*mass) if isinstance(mass, tuple) else self.quan(mass)
+ self.mass_unit = mass
density_unit = self.mass_unit / self.length_unit**3
self.time_unit = 1.0 / np.sqrt(G * density_unit)
- if 'time' in self._unit_base.keys():
- time = self._unit_base['time']
-
- if not isinstance(time, YTQuantity):
- time = self.quan(*time)
-
- self.time_unit = time
+ time = self._unit_base.get('time', self.time_unit)
+ time = self.quan(*time) if isinstance(time, tuple) else self.quan(time)
+ self.time_unit = time
@staticmethod
https://bitbucket.org/yt_analysis/yt/commits/c165ab2c6417/
Changeset: c165ab2c6417
Branch: yt
User: nmearl
Date: 2015-08-28 15:18:28+00:00
Summary: Made the logical operation more obvious
Affected #: 1 file
diff -r 6ac625090a8d42e18b624e6b70a4b56cad4095cf -r c165ab2c641752b435f500afaa45948848aca024 yt/frontends/tipsy/data_structures.py
--- a/yt/frontends/tipsy/data_structures.py
+++ b/yt/frontends/tipsy/data_structures.py
@@ -189,8 +189,8 @@
# If the cosmology parameters dictionary got set when data is
# loaded, we can assume it's a cosmological data set
- if self.comoving or self._cosmology_parameters is not None and \
- self._cosmology_parameters.get('cosmological', None) is True:
+ if self.comoving or (self._cosmology_parameters is not None and
+ self._cosmology_parameters.get('cosmological', False)):
cosm = self._cosmology_parameters or {}
self.scale_factor = hvals["time"]#In comoving simulations, time stores the scale factor a
self.cosmological_simulation = 1
https://bitbucket.org/yt_analysis/yt/commits/424b369ccc99/
Changeset: 424b369ccc99
Branch: yt
User: nmearl
Date: 2015-09-03 13:52:00+00:00
Summary: Revert back to previous behavior in recognizing cosmological data
Affected #: 2 files
diff -r c165ab2c641752b435f500afaa45948848aca024 -r 424b369ccc99454977e755169c9df233a7f647d2 doc/source/examining/loading_data.rst
--- a/doc/source/examining/loading_data.rst
+++ b/doc/source/examining/loading_data.rst
@@ -1287,10 +1287,15 @@
yt that it is a cosmological data set. In addition, you must supply the
``cosmology_parameters`` dictionary with the key ``'cosmological'`` set to ``True``.
+If you are not using a parameter file (i.e. non-Gasoline users), then you must
+use keyword ``cosmology_parameters`` when loading your data set to indicate to
+yt that it is a cosmological data set. If you do not wish to set any
+non-default cosmological parameters, you may pass an empty dictionary.
+
.. code-block:: python
import yt
- ds = yt.load(filename, cosmology_parameters={'cosmological': True})
+ ds = yt.load(filename, cosmology_parameters={})
diff -r c165ab2c641752b435f500afaa45948848aca024 -r 424b369ccc99454977e755169c9df233a7f647d2 yt/frontends/tipsy/data_structures.py
--- a/yt/frontends/tipsy/data_structures.py
+++ b/yt/frontends/tipsy/data_structures.py
@@ -189,8 +189,7 @@
# If the cosmology parameters dictionary got set when data is
# loaded, we can assume it's a cosmological data set
- if self.comoving or (self._cosmology_parameters is not None and
- self._cosmology_parameters.get('cosmological', False)):
+ if self.comoving or self._cosmology_parameters is not None:
cosm = self._cosmology_parameters or {}
self.scale_factor = hvals["time"]#In comoving simulations, time stores the scale factor a
self.cosmological_simulation = 1
https://bitbucket.org/yt_analysis/yt/commits/4012042d1eca/
Changeset: 4012042d1eca
Branch: yt
User: nmearl
Date: 2015-09-03 13:55:28+00:00
Summary: Removed redundant doc statement
Affected #: 1 file
diff -r 424b369ccc99454977e755169c9df233a7f647d2 -r 4012042d1eca7d1de4b0043a3978704a304e4de3 doc/source/examining/loading_data.rst
--- a/doc/source/examining/loading_data.rst
+++ b/doc/source/examining/loading_data.rst
@@ -1284,11 +1284,6 @@
If you are not using a parameter file (i.e. non-Gasoline users), then you must
use keyword ``cosmology_parameters`` when loading your data set to indicate to
-yt that it is a cosmological data set. In addition, you must supply the
-``cosmology_parameters`` dictionary with the key ``'cosmological'`` set to ``True``.
-
-If you are not using a parameter file (i.e. non-Gasoline users), then you must
-use keyword ``cosmology_parameters`` when loading your data set to indicate to
yt that it is a cosmological data set. If you do not wish to set any
non-default cosmological parameters, you may pass an empty dictionary.
https://bitbucket.org/yt_analysis/yt/commits/4979406431c6/
Changeset: 4979406431c6
Branch: yt
User: xarthisius
Date: 2015-09-15 03:54:46+00:00
Summary: Merged in nmearl/yt (pull request #1668)
Fixing Tipsy frontend
Affected #: 2 files
diff -r 43e11e9fc943815fd62611e5a0626a27982e24db -r 4979406431c662b038db914287ae227092199b78 doc/source/examining/loading_data.rst
--- a/doc/source/examining/loading_data.rst
+++ b/doc/source/examining/loading_data.rst
@@ -1257,8 +1257,8 @@
.. _specifying-cosmology-tipsy:
-Specifying Tipsy Cosmological Parameters
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Specifying Tipsy Cosmological Parameters and Setting Default Units
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cosmological parameters can be specified to Tipsy to enable computation of
default units. The parameters recognized are of this form:
@@ -1270,5 +1270,27 @@
'omega_matter': 0.272,
'hubble_constant': 0.702}
-These will be used set the units, if they are specified.
+If you wish to set the default units directly, you can do so by using the
+``unit_base`` keyword in the load statement.
+ .. code-block:: python
+
+ import yt
+ ds = yt.load(filename, unit_base={'length', (1.0, 'Mpc')})
+
+
+Loading Cosmological Simulations
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If you are not using a parameter file (i.e. non-Gasoline users), then you must
+use keyword ``cosmology_parameters`` when loading your data set to indicate to
+yt that it is a cosmological data set. If you do not wish to set any
+non-default cosmological parameters, you may pass an empty dictionary.
+
+ .. code-block:: python
+
+ import yt
+ ds = yt.load(filename, cosmology_parameters={})
+
+
+
diff -r 43e11e9fc943815fd62611e5a0626a27982e24db -r 4979406431c662b038db914287ae227092199b78 yt/frontends/tipsy/data_structures.py
--- a/yt/frontends/tipsy/data_structures.py
+++ b/yt/frontends/tipsy/data_structures.py
@@ -32,6 +32,7 @@
from yt.utilities.physical_constants import \
G, \
cm_per_kpc
+from yt import YTQuantity
from .fields import \
TipsyFieldInfo
@@ -167,9 +168,9 @@
self.domain_dimensions = np.ones(3, "int32") * nz
periodic = self.parameters.get('bPeriodic', True)
period = self.parameters.get('dPeriod', None)
- comoving = self.parameters.get('bComove', False)
self.periodicity = (periodic, periodic, periodic)
- if comoving and period is None:
+ self.comoving = self.parameters.get('bComove', False)
+ if self.comoving and period is None:
period = 1.0
if self.bounding_box is None:
if periodic and period is not None:
@@ -186,7 +187,9 @@
self.domain_left_edge = bbox[:,0]
self.domain_right_edge = bbox[:,1]
- if comoving:
+ # If the cosmology parameters dictionary got set when data is
+ # loaded, we can assume it's a cosmological data set
+ if self.comoving or self._cosmology_parameters is not None:
cosm = self._cosmology_parameters or {}
self.scale_factor = hvals["time"]#In comoving simulations, time stores the scale factor a
self.cosmological_simulation = 1
@@ -224,8 +227,15 @@
self.length_unit = self.quan(lu, 'kpc')*self.scale_factor
self.mass_unit = self.quan(mu, 'Msun')
density_unit = self.mass_unit/ (self.length_unit/self.scale_factor)**3
- # Gasoline's hubble constant, dHubble0, is stored units of proper code time.
- self.hubble_constant *= np.sqrt(G.in_units('kpc**3*Msun**-1*s**-2')*density_unit).value/(3.2407793e-18)
+
+ # If self.comoving is set, we know this is a gasoline data set,
+ # and we do the conversion on the hubble constant.
+ if self.comoving:
+ # Gasoline's hubble constant, dHubble0, is stored units of
+ # proper code time.
+ self.hubble_constant *= np.sqrt(G.in_units(
+ 'kpc**3*Msun**-1*s**-2') * density_unit).value / (
+ 3.2407793e-18)
cosmo = Cosmology(self.hubble_constant,
self.omega_matter, self.omega_lambda)
self.current_time = cosmo.hubble_time(self.current_redshift)
@@ -237,6 +247,24 @@
density_unit = self.mass_unit / self.length_unit**3
self.time_unit = 1.0 / np.sqrt(G * density_unit)
+ # If unit base is defined by the user, override all relevant units
+ if self._unit_base is not None:
+ length = self._unit_base.get('length', self.length_unit)
+ length = self.quan(*length) if isinstance(length, tuple) else self.quan(length)
+ self.length_unit = length
+
+ mass = self._unit_base.get('mass', self.mass_unit)
+ mass = self.quan(*mass) if isinstance(mass, tuple) else self.quan(mass)
+ self.mass_unit = mass
+
+ density_unit = self.mass_unit / self.length_unit**3
+ self.time_unit = 1.0 / np.sqrt(G * density_unit)
+
+ time = self._unit_base.get('time', self.time_unit)
+ time = self.quan(*time) if isinstance(time, tuple) else self.quan(time)
+ self.time_unit = time
+
+
@staticmethod
def _validate_header(filename):
'''
Repository URL: https://bitbucket.org/yt_analysis/yt/
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