And actually, if it *doesn't* provide you a traceback, you should be able to get one by running in pdb like: python -m pdb some_script_that_imports_yt.py and then entering 'c' to continue, and when you ctrl-c after it hangs it should tell you where it is. On Thu, Mar 3, 2022 at 7:11 AM Matthew Turk wrote:

Hi Romeel,

If you Ctrl-C out, does it tell you where it is in a traceback?

-Matt

On Thu, Mar 3, 2022 at 7:08 AM wrote:

...

Hi, I seem to be unable to import yt after I had to upgrade my Anaconda to the latest version. First there was the dreaded cubehelix import error:

% python Python 3.9.7 (default, Sep 16 2021, 13:09:58) [GCC 7.5.0] :: Anaconda, Inc. on linux Type "help", "copyright", "credits" or "license" for more information.

...

...

...

import yt Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/__init__.py", line 63, in <module> from yt.fields.api import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/fields/api.py", line 19, in <module> from . import angular_momentum File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/fields/angular_momentum.py", line 26, in <module> from .vector_operations import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/fields/vector_operations.py", line 32, in <module> from yt.geometry.geometry_handler import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/geometry/geometry_handler.py", line 29, in <module> from yt.utilities.parallel_tools.parallel_analysis_interface import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/utilities/parallel_tools/parallel_analysis_interface.py", line 30, in <module> from yt.data_objects.image_array import ImageArray File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/data_objects/image_array.py", line 18, in <module> from yt.visualization.image_writer import write_bitmap, write_image File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/visualization/image_writer.py", line 26, in <module> from .color_maps import mcm File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/visualization/color_maps.py", line 164, in <module> add_colormap("cubehelix", _cubehelix_data) File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/visualization/color_maps.py", line 52, in add_colormap mcm.register_cmap(name, yt_colormaps[name]) File "/home/rad/anaconda3/lib/python3.9/site-packages/matplotlib/cm.py", line 245, in register_cmap raise ValueError(msg) ValueError: Trying to re-register the builtin cmap 'cubehelix'.

I tried a conda update yt, also installing from pip, same result.

So I pulled the latest development version and installed it. This doesn't give the cubehelix error, but it simply hangs with no output whenever I try to import (or run) yt.

Any suggestions would be appreciated, thanks. _______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org https://mail.python.org/mailman3/lists/yt-users.python.org/ Member address: matthewturk@gmail.com

That's pretty frustrating. OK -- my guess is that this may be related to some matplotlib interactive backend changes, but I'm not sure; we did change it recently to try to avoid things like this, but the lack of responsiveness to keyboard stuff is making me wonder if that's it. Can you try two things: 1) running on the command line ensuring that DISPLAY is empty 2) running your script in a notebook with the matplotlib backend specified; specifically, using "%matplotlib inline" in a cell all on its own. The other option would be to try to use ipython with a --gui option, like: ipython --gui=wx whatever_script.py but there, I'm not sure what should go in place of "wx", since it's GUI-specific, and it could be any of: ['asyncio', 'glut', 'gtk', 'gtk2', 'gtk3', 'gtk4', 'osx', 'pyglet', 'qt', 'qt4', 'qt5', 'qt6', 'tk', 'wx', 'gtk2', 'qt4'] (likely not asyncio, glut, pyglet though.) On Thu, Mar 3, 2022 at 7:15 AM Romeel Davé wrote:

Hi Matt,

Right, forgot to mention, Ctrl-C does nothing (other than if I do it *immediately*). I have to Ctrl-Z and then manually kill.

% python -c "import yt" ^C^C^C ^C^C

romeel

...

On 3 Mar 2022, at 13:11, Matthew Turk wrote:

Hi Romeel,

If you Ctrl-C out, does it tell you where it is in a traceback?

-Matt

On Thu, Mar 3, 2022 at 7:08 AM wrote:

...

Hi, I seem to be unable to import yt after I had to upgrade my Anaconda to the latest version. First there was the dreaded cubehelix import error:

% python Python 3.9.7 (default, Sep 16 2021, 13:09:58) [GCC 7.5.0] :: Anaconda, Inc. on linux Type "help", "copyright", "credits" or "license" for more information.

...

...

...

import yt Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/__init__.py", line 63, in <module> from yt.fields.api import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/fields/api.py", line 19, in <module> from . import angular_momentum File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/fields/angular_momentum.py", line 26, in <module> from .vector_operations import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/fields/vector_operations.py", line 32, in <module> from yt.geometry.geometry_handler import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/geometry/geometry_handler.py", line 29, in <module> from yt.utilities.parallel_tools.parallel_analysis_interface import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/utilities/parallel_tools/parallel_analysis_interface.py", line 30, in <module> from yt.data_objects.image_array import ImageArray File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/data_objects/image_array.py", line 18, in <module> from yt.visualization.image_writer import write_bitmap, write_image File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/visualization/image_writer.py", line 26, in <module> from .color_maps import mcm File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/visualization/color_maps.py", line 164, in <module> add_colormap("cubehelix", _cubehelix_data) File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/visualization/color_maps.py", line 52, in add_colormap mcm.register_cmap(name, yt_colormaps[name]) File "/home/rad/anaconda3/lib/python3.9/site-packages/matplotlib/cm.py", line 245, in register_cmap raise ValueError(msg) ValueError: Trying to re-register the builtin cmap 'cubehelix'.

I tried a conda update yt, also installing from pip, same result.

So I pulled the latest development version and installed it. This doesn't give the cubehelix error, but it simply hangs with no output whenever I try to import (or run) yt.

Any suggestions would be appreciated, thanks. _______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org https://mail.python.org/mailman3/lists/yt-users.python.org/ Member address: matthewturk@gmail.com

_______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org https://mail.python.org/mailman3/lists/yt-users.python.org/ Member address: romeeld@gmail.com

_______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org https://mail.python.org/mailman3/lists/yt-users.python.org/ Member address: matthewturk@gmail.com

Nice debugging! Indeed, it seemed to have to do with my DISPLAY variable. When I set it to be empty, it works fine. (This causes other problems with X11 forwarding but at least it’s not a yt issue.) Thanks a lot! r

On 3 Mar 2022, at 13:31, Matthew Turk wrote:

That's pretty frustrating. OK -- my guess is that this may be related to some matplotlib interactive backend changes, but I'm not sure; we did change it recently to try to avoid things like this, but the lack of responsiveness to keyboard stuff is making me wonder if that's it. Can you try two things:

1) running on the command line ensuring that DISPLAY is empty 2) running your script in a notebook with the matplotlib backend specified; specifically, using "%matplotlib inline" in a cell all on its own.

The other option would be to try to use ipython with a --gui option, like:

ipython --gui=wx whatever_script.py

but there, I'm not sure what should go in place of "wx", since it's GUI-specific, and it could be any of:

['asyncio', 'glut', 'gtk', 'gtk2', 'gtk3', 'gtk4', 'osx', 'pyglet', 'qt', 'qt4', 'qt5', 'qt6', 'tk', 'wx', 'gtk2', 'qt4']

(likely not asyncio, glut, pyglet though.)

On Thu, Mar 3, 2022 at 7:15 AM Romeel Davé wrote:

...

Hi Matt,

Right, forgot to mention, Ctrl-C does nothing (other than if I do it *immediately*). I have to Ctrl-Z and then manually kill.

% python -c "import yt" ^C^C^C ^C^C

romeel

...

On 3 Mar 2022, at 13:11, Matthew Turk wrote:

Hi Romeel,

If you Ctrl-C out, does it tell you where it is in a traceback?

-Matt

On Thu, Mar 3, 2022 at 7:08 AM wrote:

...

Hi, I seem to be unable to import yt after I had to upgrade my Anaconda to the latest version. First there was the dreaded cubehelix import error:

% python Python 3.9.7 (default, Sep 16 2021, 13:09:58) [GCC 7.5.0] :: Anaconda, Inc. on linux Type "help", "copyright", "credits" or "license" for more information.

...

...

> import yt Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/__init__.py", line 63, in <module> from yt.fields.api import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/fields/api.py", line 19, in <module> from . import angular_momentum File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/fields/angular_momentum.py", line 26, in <module> from .vector_operations import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/fields/vector_operations.py", line 32, in <module> from yt.geometry.geometry_handler import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/geometry/geometry_handler.py", line 29, in <module> from yt.utilities.parallel_tools.parallel_analysis_interface import \ File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/utilities/parallel_tools/parallel_analysis_interface.py", line 30, in <module> from yt.data_objects.image_array import ImageArray File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/data_objects/image_array.py", line 18, in <module> from yt.visualization.image_writer import write_bitmap, write_image File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/visualization/image_writer.py", line 26, in <module> from .color_maps import mcm File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/visualization/color_maps.py", line 164, in <module> add_colormap("cubehelix", _cubehelix_data) File "/home/rad/anaconda3/lib/python3.9/site-packages/yt/visualization/color_maps.py", line 52, in add_colormap mcm.register_cmap(name, yt_colormaps[name]) File "/home/rad/anaconda3/lib/python3.9/site-packages/matplotlib/cm.py", line 245, in register_cmap raise ValueError(msg) ValueError: Trying to re-register the builtin cmap 'cubehelix'. >

I tried a conda update yt, also installing from pip, same result.

So I pulled the latest development version and installed it. This doesn't give the cubehelix error, but it simply hangs with no output whenever I try to import (or run) yt.

Any suggestions would be appreciated, thanks. _______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org https://mail.python.org/mailman3/lists/yt-users.python.org/ Member address: matthewturk@gmail.com

_______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org https://mail.python.org/mailman3/lists/yt-users.python.org/ Member address: romeeld@gmail.com

_______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org https://mail.python.org/mailman3/lists/yt-users.python.org/ Member address: matthewturk@gmail.com

_______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org https://mail.python.org/mailman3/lists/yt-users.python.org/ Member address: romeeld@gmail.com