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Raise consistent ValueError for invalid EntryPoint.value by jaraco · Pull Request #518 · python/importlib_metadata · GitHub

Raise consistent ValueError for invalid EntryPoint.value - #518

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jaraco merged 4 commits into
mainfrom
bugfix/488-bad-ep-value
Apr 27, 2025
Merged

Raise consistent ValueError for invalid EntryPoint.value#518
jaraco merged 4 commits into
mainfrom
bugfix/488-bad-ep-value

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jaraco commented Apr 27, 2025

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Closes #488

  • Refactored parsing and handling of EntryPoint.value.
  • Raise a ValueError if no match.
  • Also raise ValueError on construction if the value is invalid.
  • Prefer a cached property, as the property is likely to be retrieved at least 3 times (on construction and for module:attr access).

jaraco force-pushed the bugfix/488-bad-ep-value branch from f8a7887 to 9f8af01 Compare April 27, 2025 14:10

jaraco commented Apr 27, 2025

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This change does introduce some performance degradation in the entry_points performance test:

===================================== perf =====================================
exercises.py:cached distribution: 0:00:00.000713 (+-1 day, 23:59:59.999988, -2%)
exercises.py:discovery: 0:00:00.000719 (+0:00:00.000002, 0%)
exercises.py:entry_points(): 0:00:00.010800 (+0:00:00.000700, 7%)
exercises.py:entrypoint_regexp_perf: 0:00:00.000070 (+-1 day, 23:59:59.999999, -1%)
exercises.py:uncached distribution: 0:00:00.001090 (+0:00:00, 0%)

+.7 ms (7%) in this particular run. I've seen other numbers like 3% on my local machine. I saw a larger increase without the cached property.

This seems to be an acceptable cost.

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AttributeError changed to AssertionError for invalid identifiers

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