Fix caching of PEP 561 namespace packages #13124
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added 2 commits
July 14, 2022 18:18
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Diff from mypy_primer, showing the effect of this PR on open source code: ignite (https://github.com/pytorch/ignite)
- ignite/contrib/engines/common.py:6: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
+ ignite/contrib/engines/common.py:10: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
poetry (https://github.com/python-poetry/poetry)
- src/poetry/config/config.py:13: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
+ src/poetry/config/config.py:14: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
arviz (https://github.com/arviz-devs/arviz)
+ arviz/plots/backends/matplotlib/traceplot.py:5: error: Cannot find implementation or library stub for module named "matplotlib"
- arviz/plots/backends/matplotlib/traceplot.py:6: error: Cannot find implementation or library stub for module named "matplotlib"
+ arviz/plots/backends/matplotlib/kdeplot.py:3: error: Cannot find implementation or library stub for module named "matplotlib"
- arviz/plots/backends/matplotlib/kdeplot.py:5: error: Cannot find implementation or library stub for module named "matplotlib"
+ arviz/plots/backends/matplotlib/elpdplot.py:4: error: Cannot find implementation or library stub for module named "matplotlib"
- arviz/plots/backends/matplotlib/elpdplot.py:5: error: Cannot find implementation or library stub for module named "matplotlib"
+ arviz/plots/backends/bokeh/khatplot.py:4: error: Cannot find implementation or library stub for module named "matplotlib"
- arviz/plots/backends/bokeh/khatplot.py:5: error: Cannot find implementation or library stub for module named "matplotlib"
vision (https://github.com/pytorch/vision)
- torchvision/__init__.py:4: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
+ torchvision/__init__.py:15: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
jax (https://github.com/google/jax)
- jax/_src/lib/__init__.py:38: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
+ jax/_src/lib/__init__.py:48: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
pyinstrument (https://github.com/joerick/pyinstrument)
+ pyinstrument/vendor/appdirs.py:533: error: Cannot find implementation or library stub for module named "com.sun"
- pyinstrument/vendor/appdirs.py:562: error: Cannot find implementation or library stub for module named "com.sun"
- pyinstrument/magic/magic.py:6: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
+ pyinstrument/magic/magic.py:7: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
bokeh (https://github.com/bokeh/bokeh)
- bokeh/core/serialization.py:49:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
+ bokeh/core/serialization.py:53:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
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JukkaL
approved these changes
Jul 20, 2022
hauntsaninja
added a commit
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Apr 11, 2025
Fixes python#12664 A root cause is there is this stateful `_update_ns_ancestors` thing in `modulefinder`, so if things get called in the wrong order, you can get incorrect results. See also the logic in `all_imported_modules_in_file` where we've fixed several bugs like this previously, like python#13124 and python#10937 As a result of (seemingly accidentally) reusing imports across modules, we can end up in a situation where the namespace gets added as a dependency to other modules and so on the cached run we attempt to find namespace before package, which does not work I am not sure this `imports` code path is even needed, so I will open an alternate PR. I can't write a good test for this because it requires something in site_packages, but here's a minimal repro: ``` set -eux rm -rf repro mkdir repro cd repro SITEPACK=env/site-packages mkdir -p $SITEPACK mkdir $SITEPACK/ruamel mkdir $SITEPACK/ruamel/yaml printf 'from ruamel.yaml.main import *' > $SITEPACK/ruamel/yaml/__init__.py printf 'import ruamel.yaml' > $SITEPACK/ruamel/yaml/main.py printf '' > $SITEPACK/ruamel/yaml/py.typed printf 'import ruamel.yaml' > a.py printf 'import a' > main.py rm -rf .mypy_cache PYTHONPATH=$SITEPACK mypy main.py PYTHONPATH=$SITEPACK mypy main.py ```
hauntsaninja
added a commit
that referenced
this pull request
Apr 11, 2025
Fixes #12664 A root cause is there is this stateful `_update_ns_ancestors` thing in `modulefinder`, so if things get called in the wrong order, you can get incorrect results. See also the logic in `all_imported_modules_in_file` where we've fixed several bugs like this previously, like #13124 and #10937 As a result of (seemingly accidentally) reusing imports across modules, we can end up in a situation where the namespace gets added as a dependency to all other modules and so on the cached run we attempt to find namespace before package, which does not work I am not sure this `imports` code path is even needed, so I will open an alternate PR, see #18908. Relevant history: - #6582 - #6179 I can't write a good test for this because it requires something in site_packages, but here's a minimal repro: ``` set -eux rm -rf repro mkdir repro cd repro SITEPACK=env/site-packages mkdir -p $SITEPACK mkdir $SITEPACK/ruamel mkdir $SITEPACK/ruamel/yaml printf 'from ruamel.yaml.main import *' > $SITEPACK/ruamel/yaml/__init__.py printf 'import ruamel.yaml' > $SITEPACK/ruamel/yaml/main.py printf '' > $SITEPACK/ruamel/yaml/py.typed printf 'import ruamel.yaml' > a.py printf 'import a' > main.py rm -rf .mypy_cache PYTHONPATH=$SITEPACK mypy main.py PYTHONPATH=$SITEPACK mypy main.py ```
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Fixes #13085. Hopefully more robust than previous fixes along these lines.