And this problem is solved in this way. Thanks. Siegfried Op ma 2 nov. 2020 om 16:29 schreef Michael Zingale < michael.zingale@stonybrook.edu>:

This is an issue with the latest version of matplotlib (3.3) -- you should downgrade your matplotlib to 3.2 or you can try installing the latest yt from source, which has a fix for this problem.

On Mon, Nov 2, 2020 at 10:24 AM Siegfried Vanaverbeke < siegfriedvanaverbeke@gmail.com> wrote:

...

All,

I am testing a script on both windows and linux, but the latest version of yt seems to have a conflict with matplotlib:

python yt_plots.py /home/siegfried/anaconda3/envs/science/lib/python3.8/_collections_abc.py:666: MatplotlibDeprecationWarning: The global colormaps dictionary is no longer considered public API. self[key] Traceback (most recent call last): File "yt_plots.py", line 3, in <module> import yt File "/home/siegfried/anaconda3/envs/science/lib/python3.8/site-packages/yt/__init__.py", line 63, in <module> from yt.fields.api import \ File "/home/siegfried/anaconda3/envs/science/lib/python3.8/site-packages/yt/fields/api.py", line 19, in <module> from . import angular_momentum File "/home/siegfried/anaconda3/envs/science/lib/python3.8/site-packages/yt/fields/angular_momentum.py", line 26, in <module> from .vector_operations import \ File "/home/siegfried/anaconda3/envs/science/lib/python3.8/site-packages/yt/fields/vector_operations.py", line 32, in <module> from yt.geometry.geometry_handler import \ File "/home/siegfried/anaconda3/envs/science/lib/python3.8/site-packages/yt/geometry/geometry_handler.py", line 29, in <module> from yt.utilities.parallel_tools.parallel_analysis_interface import \ File "/home/siegfried/anaconda3/envs/science/lib/python3.8/site-packages/yt/utilities/parallel_tools/parallel_analysis_interface.py", line 30, in <module> from yt.data_objects.image_array import ImageArray File "/home/siegfried/anaconda3/envs/science/lib/python3.8/site-packages/yt/data_objects/image_array.py", line 18, in <module> from yt.visualization.image_writer import write_bitmap, write_image File "/home/siegfried/anaconda3/envs/science/lib/python3.8/site-packages/yt/visualization/image_writer.py", line 29, in <module> import yt.utilities.png_writer as pw File "/home/siegfried/anaconda3/envs/science/lib/python3.8/site-packages/yt/utilities/png_writer.py", line 13, in <module> import matplotlib._png as _png ModuleNotFoundError: No module named 'matplotlib._png'

It tries to import a package that doesn't exist. Any idea how this mistake came about ?

warmest regards,

Siegfried Vanaverbeke _______________________________________________ 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: michael.zingale@stonybrook.edu

-- Michael Zingale Associate Professor

Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY 11794-3800 *phone*: 631-632-8225 *e-mail*: Michael.Zingale@stonybrook.edu *web*: h <http://www.astro.sunysb.edu/mzingale>ttp://zingale.github.io github: http://github.com/zingale

_______________________________________________ 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: siegfriedvanaverbeke@gmail.com