Add fuzzy matching for Enum member access errors #20694
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KevinRK29
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Jan 30, 2026
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| Color.GREN # E: "type[Color]" has no attribute "GREN"; maybe "GREEN"? | ||
| Color.YELOW # E: "type[Color]" has no attribute "YELOW"; maybe "YELLOW"? | ||
| Color.RDE # E: "type[Color]" has no attribute "RDE" |
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This doesn't trigger fuzzy matching due to it being below the 0.75 threshold in best_matches
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Diff from mypy_primer, showing the effect of this PR on open source code: prefect (https://github.com/PrefectHQ/prefect)
- src/prefect/flow_engine.py:1703: error: "R" has no attribute "__anext__" [attr-defined]
+ src/prefect/flow_engine.py:1703: error: "R" has no attribute "__anext__"; maybe "__ne__"? [attr-defined]
- src/prefect/task_engine.py:1794: error: "R" has no attribute "__anext__" [attr-defined]
+ src/prefect/task_engine.py:1794: error: "R" has no attribute "__anext__"; maybe "__ne__"? [attr-defined]
colour (https://github.com/colour-science/colour)
- colour/utilities/network.py:154: error: "Self" has no attribute "_id" [attr-defined]
+ colour/utilities/network.py:154: error: "Self" has no attribute "_id"; maybe "id"? [attr-defined]
zulip (https://github.com/zulip/zulip)
+ zerver/models/push_notifications.py:73: error: "type[TokenKind]" has no attribute "choices" [attr-defined]
+ zerver/models/push_notifications.py:114: error: "type[ErrorCode]" has no attribute "choices" [attr-defined]
+ zerver/models/messages.py:53: error: "type[MessageType]" has no attribute "choices" [attr-defined]
+ zerver/models/user_topics.py:44: error: "type[VisibilityPolicy]" has no attribute "choices" [attr-defined]
ibis (https://github.com/ibis-project/ibis)
- ibis/backends/__init__.py:1275: error: "None" has no attribute "__iter__" (not iterable) [attr-defined]
+ ibis/backends/__init__.py:1275: error: "None" has no attribute "__iter__"; maybe "__dir__" or "__str__"? (not iterable) [attr-defined]
- ibis/backends/clickhouse/__init__.py:253: error: "None" has no attribute "__iter__" (not iterable) [attr-defined]
+ ibis/backends/clickhouse/__init__.py:253: error: "None" has no attribute "__iter__"; maybe "__dir__" or "__str__"? (not iterable) [attr-defined]
apprise (https://github.com/caronc/apprise)
- apprise/persistent_store.py:1324: error: "None" has no attribute "__iter__" (not iterable) [attr-defined]
+ apprise/persistent_store.py:1324: error: "None" has no attribute "__iter__"; maybe "__dir__" or "__str__"? (not iterable) [attr-defined]
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This PR adds fuzzy matching suggestions when accessing invalid enum members, similar to the existing behavior for module imports and instance attributes.