[yt-users] from yt.analysis_modules.api import EnzoSimulation

Matthew Turk matthewturk at gmail.com
Mon Apr 25 10:46:12 PDT 2011 

Hi Shankar,

Good to hear you resolved it.

As a note, if you're running on an SGI UV machine, I've seen things
like this in the past with mpi4py (which I note you say you haven't
installed) if I ran in parallel and didn't use the python2.7-mpi
executable.  You can get this with mpi4py by running "python2.7
setup.py install_exe".

-Matt

On Mon, Apr 25, 2011 at 1:35 PM, Agarwal, Shankar <sagarwal at ku.edu> wrote:
> Hi Matt,
>
> I was able to resolve the issue by replacing
>
>   from yt.analysis_modules.api import EnzoSimulation
>   par_file = sys.argv[1]
>   es = EnzoSimulation(par_file, get_redshift_outputs=False, initial_redshift=99, final_redshift=-0.001)
>
> with
>
>   import yt.analysis_modules.simulation_handler.api as es
>   par_file = sys.argv[1]
>   pf = es.EnzoSimulation(par_file, get_redshift_outputs=True, initial_redshift=50, final_redshift=0)
>
>
> In any case, your requested output is below (I think it has something to do with mpi4py, which I have not installed yet)
>
> [sagarwal at ember cqi]$ gdb python
> GNU gdb (GDB) SUSE (7.0-0.4.16)
> Copyright (C) 2009 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-suse-linux".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /gpfs1/u/ac/sagarwal/software/yt/yt-x86_64/bin/python...done.
> (gdb) run my_script.py
> Starting program: /gpfs1/u/ac/sagarwal/software/yt/yt-x86_64/bin/python my_script.py
> Missing separate debuginfo for /lib64/ld-linux-x86-64.so.2
> Try: zypper install -C "debuginfo(build-id)=31d4dbbe49e777eb2dceeb2b6cb722d01a7b35dc"
> Missing separate debuginfo for /lib64/libpthread.so.0
> Try: zypper install -C "debuginfo(build-id)=1f39dc121cb7220d95ee27e00f745c2832346070"
> [Thread debugging using libthread_db enabled]
> Missing separate debuginfo for /lib64/libdl.so.2
> Try: zypper install -C "debuginfo(build-id)=fbb2084bce1dd7adc76d9ef90319cf89b601db94"
> Missing separate debuginfo for /lib64/libutil.so.1
> Try: zypper install -C "debuginfo(build-id)=c6a6d0d17dedd26b06e7ffaf6e7b6947e585d23b"
> Missing separate debuginfo for /lib64/libm.so.6
> Try: zypper install -C "debuginfo(build-id)=365e4d2c812908177265c8223f222a1665fe1035"
> Missing separate debuginfo for /lib64/libc.so.6
> Try: zypper install -C "debuginfo(build-id)=609a6e344dfdc723c6c768cae37c3d91373a731b"
> Missing separate debuginfo for /usr/lib64/libssl.so.0.9.8
> Try: zypper install -C "debuginfo(build-id)=32ac9dafd97959233238d768cf51c0d1f56108b3"
> Missing separate debuginfo for /usr/lib64/libcrypto.so.0.9.8
> Try: zypper install -C "debuginfo(build-id)=1f7e12a6de273136ada630a97a5580f47cf62a0d"
> Missing separate debuginfo for /lib64/libncurses.so.5
> Try: zypper install -C "debuginfo(build-id)=fe94a82e6d5f63f4063b23ef8a8aa934a4b8c015"
> Missing separate debuginfo for /lib64/libreadline.so.5
> Try: zypper install -C "debuginfo(build-id)=bb1f36da9edb1cfffb2aa3c6f094824353d8572f"
> Missing separate debuginfo for /usr/lib64/libstdc++.so.6
> Try: zypper install -C "debuginfo(build-id)=e907b88d15f5e1312d1ae0c7c61f8da92745738b"
> Missing separate debuginfo for /lib64/libgcc_s.so.1
> Try: zypper install -C "debuginfo(build-id)=3f06bcfc74f9b01780d68e89b8dce403bef9b2e3"
> Missing separate debuginfo for /usr/lib64/libgfortran.so.3
> Try: zypper install -C "debuginfo(build-id)=06659f9e2a7c2cbd7771266eca5d573397f3ade3"
> Missing separate debuginfo for /usr/lib64/libBLT24.so
> Try: zypper install -C "debuginfo(build-id)=9ed4be8ea3e1d06536b8fd4e24817828c150b97c"
> Missing separate debuginfo for /usr/lib64/libtk8.5.so
> Try: zypper install -C "debuginfo(build-id)=376e10f1384ca2b8d7e32241aa9b21af2406733c"
> Missing separate debuginfo for /usr/lib64/libtcl8.5.so
> Try: zypper install -C "debuginfo(build-id)=d6e9d896299126a7e63b8e2d833f735a21fe3f57"
> Missing separate debuginfo for /usr/lib64/libX11.so.6
> Try: zypper install -C "debuginfo(build-id)=dab04774eef6119f774b2397a0bdc654c12220f9"
> Missing separate debuginfo for /usr/lib64/libXss.so.1
> Try: zypper install -C "debuginfo(build-id)=ac45c253ff4760f8a7f24c18eb82557e43859d8d"
> Missing separate debuginfo for /usr/lib64/libXext.so.6
> Try: zypper install -C "debuginfo(build-id)=4d348b514a3a427748b4f8314b9a5028b56c4559"
> Missing separate debuginfo for /usr/lib64/libXft.so.2
> Try: zypper install -C "debuginfo(build-id)=05c029c33c0623d9ac9652e8118ef2f480a01709"
> Missing separate debuginfo for /usr/lib64/libfontconfig.so.1
> Try: zypper install -C "debuginfo(build-id)=150b2aee9ba64585e8e84da22664d51252ceb93d"
> Missing separate debuginfo for /usr/lib64/libXrender.so.1
> Try: zypper install -C "debuginfo(build-id)=8f5ba4c59765a6bcf81ace6f3e9d9266e8986518"
> Missing separate debuginfo for /usr/lib64/libxcb-xlib.so.0
> Try: zypper install -C "debuginfo(build-id)=be562d9316e960c35fee2ed868a0e5b17308d575"
> Missing separate debuginfo for /usr/lib64/libxcb.so.1
> Try: zypper install -C "debuginfo(build-id)=b420d129816f22330cd25c45cdff8ef41941abca"
> Missing separate debuginfo for /usr/lib64/libXau.so.6
> Try: zypper install -C "debuginfo(build-id)=9213680483512b8ae3ff90d914900be4637bb495"
> Missing separate debuginfo for /lib64/libexpat.so.1
> Try: zypper install -C "debuginfo(build-id)=2696e815e28d6ef4fcb614baf8b7802891fd5341"
> Missing separate debuginfo for /lib64/librt.so.1
> Try: zypper install -C "debuginfo(build-id)=81a3a96c7c0bc95cb4aa5b29702689cf324a7fcd"
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007fffe7b9646f in PMPI_Finalized (flag=0x7fffffff0b50) at finalized.c:27
> 27      finalized.c: No such file or directory.
>        in finalized.c
> (gdb) bt
> #0  0x00007fffe7b9646f in PMPI_Finalized (flag=0x7fffffff0b50) at finalized.c:27
> #1  0x00007fffe7e91c02 in __pyx_f_6mpi4py_3MPI_initialize () at src/mpi4py.MPI.c:3775
> #2  initMPI () at src/mpi4py.MPI.c:16824
> #3  0x00000000004c19ad in _PyImport_LoadDynamicModule (name=0x7fffffff1cc0 "mpi4py.MPI",
>    pathname=0x7fffffff0bf0 "/u/ac/sagarwal/.local/lib/python2.7/site-packages/mpi4py/MPI.so", fp=<value optimized out>) at ./Python/importdl.c:53
> #4  0x00000000004bfe24 in import_submodule (mod=0x233a600, subname=0xcf47fc "MPI", fullname=0x7fffffff1cc0 "mpi4py.MPI") at Python/import.c:2596
> #5  0x00000000004c03c9 in ensure_fromlist (mod=0x233a600, fromlist=0x232aed0, buf=0x7fffffff1cc0 "mpi4py.MPI", buflen=6, recursive=0) at Python/import.c:2507
> #6  0x00000000004c0998 in import_module_level (name=0x0, globals=<value optimized out>, locals=<value optimized out>, fromlist=0x232aed0, level=-1) at Python/import.c:2175
> #7  0x00000000004c0daf in PyImport_ImportModuleLevel (name=0xcefdd4 "mpi4py", globals=0x236cce0, locals=0x236cce0, fromlist=0x232aed0, level=-1) at Python/import.c:2189
> #8  0x00000000004a1089 in builtin___import__ (self=<value optimized out>, args=<value optimized out>, kwds=<value optimized out>) at Python/bltinmodule.c:49
> #9  0x000000000041b9fd in PyObject_Call (func=0x7ffff7fdddd0, arg=0x232e9f0, kw=0x0) at Objects/abstract.c:2529
> #10 0x00000000004a1e06 in PyEval_CallObjectWithKeywords (func=0x7ffff7fdddd0, arg=0x232e9f0, kw=0x0) at Python/ceval.c:3881
> #11 0x00000000004a6ac3 in PyEval_EvalFrameEx (f=0x236ce00, throwflag=<value optimized out>) at Python/ceval.c:2332
> #12 0x00000000004aa5e9 in PyEval_EvalCodeEx (co=0x2338d30, globals=<value optimized out>, locals=<value optimized out>, args=0x0, argcount=0, kws=0x0, kwcount=0,
>    defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:3252
> #13 0x00000000004aa752 in PyEval_EvalCode (co=0x7fffffff0b50, globals=0x7ffff7fb6f00, locals=0x0) at Python/ceval.c:666
> #14 0x00000000004bdd5a in PyImport_ExecCodeModuleEx (name=0x7fffffff52d0 "yt.analysis_modules.light_ray.light_ray", co=0x2338d30,
>    pathname=0x7fffffff3100 "/gpfs1/u/ac/sagarwal/software/yt/yt-x86_64/src/yt-hg/yt/analysis_modules/light_ray/light_ray.pyc") at Python/import.c:681
> #15 0x00000000004bf03d in load_source_module (name=0x7fffffff52d0 "yt.analysis_modules.light_ray.light_ray",
>    pathname=0x7fffffff3100 "/gpfs1/u/ac/sagarwal/software/yt/yt-x86_64/src/yt-hg/yt/analysis_modules/light_ray/light_ray.pyc", fp=<value optimized out>)
>    at Python/import.c:1021
> #16 0x00000000004bfe24 in import_submodule (mod=0x2328e88, subname=0x7fffffff52ee "light_ray", fullname=0x7fffffff52d0 "yt.analysis_modules.light_ray.light_ray")
>    at Python/import.c:2596
> #17 0x00000000004c00ac in load_next (mod=0x2328e88, altmod=0x2328e88, p_name=<value optimized out>, buf=0x7fffffff52d0 "yt.analysis_modules.light_ray.light_ray",
>    p_buflen=0x7fffffff62d8) at Python/import.c:2416
> #18 0x00000000004c0701 in import_module_level (name=0x0, globals=0x7b4010, locals=<value optimized out>, fromlist=0x232ae50, level=1) at Python/import.c:2137
> ---Type <return> to continue, or q <return> to quit---
> #19 0x00000000004c0daf in PyImport_ImportModuleLevel (name=0x23250e4 "light_ray", globals=0x235b160, locals=0x235b160, fromlist=0x232ae50, level=1) at Python/import.c:2189
> #20 0x00000000004a1089 in builtin___import__ (self=<value optimized out>, args=<value optimized out>, kwds=<value optimized out>) at Python/bltinmodule.c:49
> #21 0x000000000041b9fd in PyObject_Call (func=0x7ffff7fdddd0, arg=0x20bec50, kw=0x0) at Objects/abstract.c:2529
> #22 0x00000000004a1e06 in PyEval_CallObjectWithKeywords (func=0x7ffff7fdddd0, arg=0x20bec50, kw=0x0) at Python/ceval.c:3881
> #23 0x00000000004a6ac3 in PyEval_EvalFrameEx (f=0x2366df0, throwflag=<value optimized out>) at Python/ceval.c:2332
> #24 0x00000000004aa5e9 in PyEval_EvalCodeEx (co=0x228b4b0, globals=<value optimized out>, locals=<value optimized out>, args=0x0, argcount=0, kws=0x0, kwcount=0,
>    defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:3252
> #25 0x00000000004aa752 in PyEval_EvalCode (co=0x7fffffff0b50, globals=0x7ffff7fb6f00, locals=0x0) at Python/ceval.c:666
> #26 0x00000000004bdd5a in PyImport_ExecCodeModuleEx (name=0x7fffffff88e0 "yt.analysis_modules.light_ray.api", co=0x228b4b0,
>    pathname=0x7fffffff6710 "/gpfs1/u/ac/sagarwal/software/yt/yt-x86_64/src/yt-hg/yt/analysis_modules/light_ray/api.pyc") at Python/import.c:681
> #27 0x00000000004bf03d in load_source_module (name=0x7fffffff88e0 "yt.analysis_modules.light_ray.api",
>    pathname=0x7fffffff6710 "/gpfs1/u/ac/sagarwal/software/yt/yt-x86_64/src/yt-hg/yt/analysis_modules/light_ray/api.pyc", fp=<value optimized out>) at Python/import.c:1021
> #28 0x00000000004bfe24 in import_submodule (mod=0x2328e88, subname=0x7fffffff88fe "api", fullname=0x7fffffff88e0 "yt.analysis_modules.light_ray.api")
>    at Python/import.c:2596
> #29 0x00000000004c00ac in load_next (mod=0x2328e88, altmod=0x2328e88, p_name=<value optimized out>, buf=0x7fffffff88e0 "yt.analysis_modules.light_ray.api",
>    p_buflen=0x7fffffff98e8) at Python/import.c:2416
> #30 0x00000000004c074d in import_module_level (name=0x0, globals=<value optimized out>, locals=<value optimized out>, fromlist=0x7ffff71e29d0, level=1)
>    at Python/import.c:2145
> #31 0x00000000004c0daf in PyImport_ImportModuleLevel (name=0x2271bb4 "light_ray.api", globals=0x2218690, locals=0x2218690, fromlist=0x7ffff71e29d0, level=1)
>    at Python/import.c:2189
> #32 0x00000000004a1089 in builtin___import__ (self=<value optimized out>, args=<value optimized out>, kwds=<value optimized out>) at Python/bltinmodule.c:49
> #33 0x000000000041b9fd in PyObject_Call (func=0x7ffff7fdddd0, arg=0xbd5350, kw=0x0) at Objects/abstract.c:2529
> #34 0x00000000004a1e06 in PyEval_CallObjectWithKeywords (func=0x7ffff7fdddd0, arg=0xbd5350, kw=0x0) at Python/ceval.c:3881
> #35 0x00000000004a6ac3 in PyEval_EvalFrameEx (f=0x2216540, throwflag=<value optimized out>) at Python/ceval.c:2332
> #36 0x00000000004aa5e9 in PyEval_EvalCodeEx (co=0x7ffff71cccb0, globals=<value optimized out>, locals=<value optimized out>, args=0x0, argcount=0, kws=0x0, kwcount=0,
>    defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:3252
> ---Type <return> to continue, or q <return> to quit---
> #37 0x00000000004aa752 in PyEval_EvalCode (co=0x7fffffff0b50, globals=0x7ffff7fb6f00, locals=0x0) at Python/ceval.c:666
> #38 0x00000000004bdd5a in PyImport_ExecCodeModuleEx (name=0x7fffffffbef0 "yt.analysis_modules.api", co=0x7ffff71cccb0,
>    pathname=0x7fffffff9d20 "/gpfs1/u/ac/sagarwal/software/yt/yt-x86_64/src/yt-hg/yt/analysis_modules/api.pyc") at Python/import.c:681
> #39 0x00000000004bf03d in load_source_module (name=0x7fffffffbef0 "yt.analysis_modules.api",
>    pathname=0x7fffffff9d20 "/gpfs1/u/ac/sagarwal/software/yt/yt-x86_64/src/yt-hg/yt/analysis_modules/api.pyc", fp=<value optimized out>) at Python/import.c:1021
> #40 0x00000000004bfe24 in import_submodule (mod=0x161c948, subname=0x7fffffffbf04 "api", fullname=0x7fffffffbef0 "yt.analysis_modules.api") at Python/import.c:2596
> #41 0x00000000004c00ac in load_next (mod=0x161c948, altmod=0x161c948, p_name=<value optimized out>, buf=0x7fffffffbef0 "yt.analysis_modules.api", p_buflen=0x7fffffffcef8)
>    at Python/import.c:2416
> #42 0x00000000004c074d in import_module_level (name=0x0, globals=<value optimized out>, locals=<value optimized out>, fromlist=0x7ffff7e37f10, level=23185736)
>    at Python/import.c:2145
> #43 0x00000000004c0daf in PyImport_ImportModuleLevel (name=0x7ffff7e37ed4 "yt.analysis_modules.api", globals=0x7f3260, locals=0x7f3260, fromlist=0x7ffff7e37f10, level=-1)
>    at Python/import.c:2189
> #44 0x00000000004a1089 in builtin___import__ (self=<value optimized out>, args=<value optimized out>, kwds=<value optimized out>) at Python/bltinmodule.c:49
> #45 0x000000000041b9fd in PyObject_Call (func=0x7ffff7fdddd0, arg=0x7ffff7e19af8, kw=0x0) at Objects/abstract.c:2529
> #46 0x00000000004a1e06 in PyEval_CallObjectWithKeywords (func=0x7ffff7fdddd0, arg=0x7ffff7e19af8, kw=0x0) at Python/ceval.c:3881
> #47 0x00000000004a6ac3 in PyEval_EvalFrameEx (f=0x885ee0, throwflag=<value optimized out>) at Python/ceval.c:2332
> #48 0x00000000004aa5e9 in PyEval_EvalCodeEx (co=0x7ffff7e32230, globals=<value optimized out>, locals=<value optimized out>, args=0x0, argcount=0, kws=0x0, kwcount=0,
>    defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:3252
> #49 0x00000000004aa752 in PyEval_EvalCode (co=0x7fffffff0b50, globals=0x7ffff7fb6f00, locals=0x0) at Python/ceval.c:666
> #50 0x00000000004cae5c in run_mod (arena=<value optimized out>, flags=<value optimized out>, locals=<value optimized out>, globals=<value optimized out>,
>    filename=<value optimized out>, mod=<value optimized out>) at Python/pythonrun.c:1346
> #51 PyRun_FileExFlags (arena=<value optimized out>, flags=<value optimized out>, locals=<value optimized out>, globals=<value optimized out>,
>    filename=<value optimized out>, mod=<value optimized out>) at Python/pythonrun.c:1332
> #52 0x00000000004cb18b in PyRun_SimpleFileExFlags (fp=0x870760, filename=0x7fffffffda6a "my_script.py", closeit=1, flags=0x7fffffffd4b0) at Python/pythonrun.c:936
> #53 0x000000000041703a in Py_Main (argc=-134774624, argv=0x7fffffffd5c8) at Modules/main.c:599
> #54 0x00007ffff7224bc6 in __libc_start_main () from /lib64/libc.so.6
> ---Type <return> to continue, or q <return> to quit---
> #55 0x00000000004161d9 in _start () at ../sysdeps/x86_64/elf/start.S:113
> (gdb)
> (gdb)
>
>
> ________________________________________
> From: yt-users-bounces at lists.spacepope.org [yt-users-bounces at lists.spacepope.org] on behalf of Matthew Turk [matthewturk at gmail.com]
> Sent: Monday, April 25, 2011 11:50 AM
> To: Discussion of the yt analysis package
> Subject: Re: [yt-users] from yt.analysis_modules.api import EnzoSimulation
>
> Hi Shankar,
>
> This is a worrisome error.  Please leave in the import in your script
> and run it like this:
>
> gdb python
>
> At the gdb prompt, type "run my_script.py" where "my_script.py" is your script.
>
> When it segfaults, type:
>
> bt
>
> And then send that here, to the list.
>
> Best,
>
> Matt
>
> On Sun, Apr 24, 2011 at 12:34 AM, Agarwal, Shankar <sagarwal at ku.edu> wrote:
>> Hi G.S.
>>
>> Unfortunately, that did not work. If I skip "from yt.analysis_modules.api import EnzoSimulation", then i get the following error:
>>
>> NameError: name 'EnzoSimulation' is not defined
>>
>>
>> [sagarwal at ember ~/junk]$ python
>> Python 2.7.1 (r271:86832, Apr 23 2011, 12:22:34)
>> [GCC 4.3.4 [gcc-4_3-branch revision 152973]] on linux2
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>> from yt.mods import *
>>>>> import numpy as na
>>>>> import yt.visualization.volume_rendering.api as vr
>>>>> import matplotlib.pylab as pl
>>>>> import sys
>>>>> from yt.visualization.image_writer import write_bitmap
>>>>> from yt.analysis_modules.api import EnzoSimulation
>> Segmentation fault
>>
>>
>> For reference, the script I am talking about is http://paste.enzotools.org/show/1580/
>>
>> Shankar
>> ________________________________________
>> From: yt-users-bounces at lists.spacepope.org [yt-users-bounces at lists.spacepope.org] on behalf of gso at physics.ucsd.edu [gso at physics.ucsd.edu]
>> Sent: Saturday, April 23, 2011 6:18 PM
>> To: Discussion of the yt analysis package
>> Subject: Re: [yt-users] from yt.analysis_modules.api import EnzoSimulation
>>
>> Actually I just tried and you can use
>>
>> from yt.mods impolrt *
>> pf = EnzoSimulation("par_file")
>>
>> just skip the from yt.analysis_modules.api import EnzoSimulation
>> and it will work
>>
>> From
>> G.S.
>>
>>> I think having to import EnzoSimulation is the old YT, the newer YT you
>>> can just do
>>>
>>> from yt.mods import *
>>> pf = load("par_file")
>>> [mine is usually something like pf = load("DD0000/DD0000")]
>>>
>>> see if that works
>>>
>>> From
>>> G.S.
>>>
>>>> Hi,
>>>>
>>>> I just downloaded the latest
>>>> http://hg.enzotools.org/yt/raw/stable/doc/install_script.sh
>>>>
>>>> and installed YT. Now, my python script (at the end of the email) quits
>>>> with a "Segmentation fault" error at line-8 (yt.analysis_modules.api):
>>>>
>>>> [sagarwal at ember ~/junk]$ python colorbars.py parameterfile
>>>> Segmentation fault
>>>>
>>>> If I comment out line8, then (obviously) I get the following error:
>>>>
>>>> Adding gaussian at -2.0 with width 0.5 and colors (0.0, 0.0, 0.502,
>>>> 0.00031622776601683794)
>>>> Adding gaussian at 0.5 with width 0.5 and colors (0.85737517232758309,
>>>> 1.0, 0.12482388288648784, 0.005623413251903491)
>>>> Adding gaussian at 3.0 with width 0.5 and colors (0.99609999999999999,
>>>> 0.97250000000000003, 0.99609999999999999, 0.10000000000000001)
>>>> Traceback (most recent call last):
>>>>   File "colorbars.py", line 36, in <module>
>>>>     es = EnzoSimulation(par_file, get_redshift_outputs=True,
>>>> initial_redshift=50, final_redshift=0)
>>>> NameError: name 'EnzoSimulation' is not defined
>>>>
>>>> Any ideas?
>>>> Shankar
>>>>
>>>>
>>>> python_script...
>>>> -------------------------------------------------------------
>>>> import numpy as na
>>>> from yt.mods import *
>>>> import yt.visualization.volume_rendering.api as vr
>>>> import matplotlib.pylab as pl
>>>> import sys
>>>>
>>>> from yt.mods import *
>>>> from yt.visualization.image_writer import write_bitmap
>>>> from yt.analysis_modules.api import EnzoSimulation
>>>>
>>>> blah..blah...
>>>>
>>>> par_file = sys.argv[1]
>>>> es = EnzoSimulation(par_file, get_redshift_outputs=True,
>>>> initial_redshift=50, final_redshift=0)
>>>> -------------------------------------------------------------
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> _______________________________________________
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