BUG: Add importlib_resources

[larsoner]

I am hitting a bug as of yesterday on 7.3.0 pyface:

$ python -c "from traits.etsconfig.api import ETSConfig; ETSConfig.toolkit = 'qt4'; from mayavi import mlab"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/larsoner/anaconda3/envs/mne/lib/python3.8/site-packages/mayavi/mlab.py", line 15, in <module>
    from mayavi.core.common import process_ui_events
  File "/home/larsoner/anaconda3/envs/mne/lib/python3.8/site-packages/mayavi/core/common.py", line 21, in <module>
    from pyface import api as pyface
  File "/home/larsoner/anaconda3/envs/mne/lib/python3.8/site-packages/pyface/api.py", line 13, in <module>
    from .about_dialog import AboutDialog
...
  File "/home/larsoner/anaconda3/envs/mne/lib/python3.8/site-packages/pyface/resource/api.py", line 13, in <module>
    from .resource_manager import ResourceManager
  File "/home/larsoner/anaconda3/envs/mne/lib/python3.8/site-packages/pyface/resource/resource_manager.py", line 20, in <module>
    from importlib_resources import files
ModuleNotFoundError: No module named 'importlib_resources'

Looks like this requirement was added 3 months ago, so in the 7.3.0 cycle:

https://github.com/enthought/pyface/blame/9419755294ce22aad96c2b323023f92013d83e48/etstool.py#L95

I'm not sure if this is the right fix / place to do it, I'm not very experienced with conda-forge!

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

@conda-forge-admin, please rerender

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

• noarch: python recipes are recommended to have a lower bound on the python version. This recommendation will become a requirement in the future.

[github-actions]

Hi! This is the friendly automated conda-forge-webservice.
I tried to rerender for you, but it looks like there was nothing to do.

[github-actions]

Hi! This is the friendly automated conda-forge-webservice.
I tried to rerender for you, but it looks like there was nothing to do.

[larsoner]

FYI I tracked this down based on what I think might be related errors on CIs on Linux and on Windows, where I see:

ValueError: cannot set toolkit to qt4 because it has already been set to null

[yoda-vid]

Looks like these newly missing dependencies are also mentioned in enthought/mayavi#1000. I get a importlib_metadata error from Pyface:

Python 3.7.10 (default, Feb 26 2021, 10:16:00) 
[Clang 10.0.0 ] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from mayavi import mlab
Traceback (most recent call last):
  File "/src/pyface/pyface/base_toolkit.py", line 73, in <module>
    import importlib.metadata as importlib_metadata
ModuleNotFoundError: No module named 'importlib.metadata'

and then the importlib_resources error after installing import_metadata.

[larsoner]

cc @grlee77 hoping for a review on this one so that the package can be fixed

[grlee77]

Thanks @larsoner and @yoda-vid. My apologies that this PR got neglected for so long. If either of you want to be co-maintainers here, please make a separate PR for that.

[ntorresalberto]

Looks like these newly missing dependencies are also mentioned in enthought/mayavi#1000. I get a importlib_metadata error from Pyface:

Python 3.7.10 (default, Feb 26 2021, 10:16:00) 
[Clang 10.0.0 ] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from mayavi import mlab
Traceback (most recent call last):
  File "/src/pyface/pyface/base_toolkit.py", line 73, in <module>
    import importlib.metadata as importlib_metadata
ModuleNotFoundError: No module named 'importlib.metadata'

and then the importlib_resources error after installing import_metadata.

Just wanted to point out that I found this error again with Python 3.8.10 and mayavi.

For future googlers, the solution was to conda install pyface (which solved it even though I already had it installed, it still pulled importlib_metadata and importlib_resourc~).

[petervandenabeele]

I hit this when trying to run JupyterHub that was installed with conda / mamba install.

ModuleNotFoundError: No module named 'importlib_resources'

The proposed fix to do conda install pyface did not work for me.

What did work for me was to add mamba install ... importlib_metadata importlib_resources ....
After that, my JupyterHub and Notebooks started correctly.