Make datetime generic over tzinfo by srittau · Pull Request #11844 · python/typeshed

srittau · 2024-04-29T11:58:29Z

No description provided.

srittau · 2024-04-29T11:59:40Z

This is a trial to judge the impact of such a change that could prevent runtime errors due to mixing timezone-aware and unaware datetimes.

srittau · 2024-04-29T15:02:32Z

While I think there's some promise in this approach, I struggle with Any annotated datetimes. The __sub__ overloads (for example), derive a return type of Any, probably because mypy is merging the timedelta and NoReturn annotations of multiple annotations. Does anyone have an idea how to work around this?

bluetech · 2024-05-15T14:01:32Z

I don't have much to add except to say that having this will be truly great, my code is littered with "aware"/"not aware" comments which really should be in the type, so I hope you can get it to work. (I haven't been bothered with it enough to use something like DataType yet).

I am curious about two things:

Why default TzInfoT to Any instead of tzinfo | None?
Why are the overloads needed? I guess typecheckers don't know the type of default values so they don't see that fromtimestamp(123) is the same as fromtimestamp(123, tz=None) and so can't infer TzInfoT=None?

srittau · 2024-05-19T09:52:04Z

@bluetech

Why default TzInfoT to Any instead of tzinfo | None?

It tried both, but both didn't work. tzinfo | None is also my preferred default, but I hoped that Any would have less problems when it didn't.

Why are the overloads needed? I guess typecheckers don't know the type of default values so they don't see that fromtimestamp(123) is the same as fromtimestamp(123, tz=None) and so can't infer TzInfoT=None?

Exactly.

xmo-odoo · 2026-09-30T10:51:25Z

+        self: datetime[None] | datetime[_TzInfo | None], value: datetime[None] | datetime[_TzInfo | None], /
+    ) -> timedelta: ...
+    @overload
+    def __sub__(self: datetime[Any], value: datetime[Any], /) -> NoReturn: ...


Are these fallbacks necessary? I'd assume if left out the type checkers should report something like the operation not being supported, which would be a better user experience, no?

This should be compatible with the old code.

Also make `Final`

`NoReturn` -> `Never`

Now it should return `Self`, which means `datetime[Any]` for plain `datetime` objects. Since the format string is user defined, callers usually know whether the returned datetime object is naive or tz-aware, so a union can be overly strict.

srittau · 2026-10-29T13:42:46Z

This is another class that could benefit greatly from AnyOf (python/typing#566).

github-actions · 2026-10-29T14:10:32Z

Diff from mypy_primer, showing the effect of this PR on open source code:

tornado (https://github.com/tornadoweb/tornado)
+ tornado/test/locale_test.py:103: error: Unsupported operand types for - ("object" and "timedelta")  [operator]
+ tornado/test/locale_test.py:103: error: Argument 1 to "format_date" of "Locale" has incompatible type "timedelta"; expected "int | float | datetime[Any]"  [arg-type]
+ tornado/test/locale_test.py:109: error: Unsupported operand types for - ("object" and "timedelta")  [operator]
+ tornado/test/locale_test.py:109: error: Argument 1 to "format_date" of "Locale" has incompatible type "timedelta"; expected "int | float | datetime[Any]"  [arg-type]
+ tornado/test/locale_test.py:115: error: Unsupported operand types for - ("object" and "timedelta")  [operator]
+ tornado/test/locale_test.py:115: error: Argument 1 to "format_date" of "Locale" has incompatible type "timedelta"; expected "int | float | datetime[Any]"  [arg-type]
+ tornado/test/locale_test.py:122: error: Unsupported operand types for - ("object" and "timedelta")  [operator]
+ tornado/test/locale_test.py:122: error: Argument 1 to "format_date" of "Locale" has incompatible type "timedelta"; expected "int | float | datetime[Any]"  [arg-type]
+ tornado/test/locale_test.py:129: error: Unsupported operand types for - ("object" and "timedelta")  [operator]
+ tornado/test/locale_test.py:129: error: Incompatible types in assignment (expression has type "timedelta", variable has type "datetime[None]")  [assignment]
+ tornado/test/locale_test.py:135: error: Unsupported operand types for - ("object" and "timedelta")  [operator]
+ tornado/test/locale_test.py:135: error: Incompatible types in assignment (expression has type "timedelta", variable has type "datetime[None]")  [assignment]
+ tornado/test/locale_test.py:141: error: Unsupported operand types for - ("object" and "timedelta")  [operator]
+ tornado/test/locale_test.py:141: error: Incompatible types in assignment (expression has type "timedelta", variable has type "datetime[None]")  [assignment]
+ tornado/test/locale_test.py:147: error: Unsupported operand types for + ("object" and "timedelta")  [operator]
+ tornado/test/locale_test.py:147: error: Incompatible types in assignment (expression has type "timedelta", variable has type "datetime[None]")  [assignment]

prefect (https://github.com/PrefectHQ/prefect)
- src/prefect/_internal/schemas/validators.py:231: error: Incompatible return value type (got "datetime", expected "DateTime")  [return-value]
+ src/prefect/_internal/schemas/validators.py:231: error: Incompatible return value type (got "datetime[Any]", expected "DateTime")  [return-value]
- src/prefect/_internal/schemas/validators.py:264: error: Item "None" of "tzinfo | None" has no attribute "name"  [union-attr]
- src/prefect/server/schemas/schedules.py:540: error: Argument 1 to "_next_date" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/schemas/schedules.py:540: error: Argument 1 to "_next_date" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/schemas/schedules.py:553: error: Incompatible types in "yield" (actual type "datetime", expected type "DateTime")  [misc]
+ src/prefect/server/schemas/schedules.py:553: error: Incompatible types in "yield" (actual type "datetime[Any]", expected type "DateTime")  [misc]
- src/prefect/server/schemas/schedules.py:561: error: Argument 1 to "_next_date" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/schemas/schedules.py:561: error: Argument 1 to "_next_date" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/schemas/schedules.py:682: error: Item "datetime" of "datetime | Any" has no attribute "tz"  [union-attr]
+ src/prefect/server/schemas/schedules.py:682: error: Item "datetime[Any]" of "datetime[Any] | Any" has no attribute "tz"  [union-attr]
- src/prefect/server/schemas/schedules.py:713: error: Incompatible types in "yield" (actual type "datetime", expected type "DateTime")  [misc]
+ src/prefect/server/schemas/schedules.py:713: error: Incompatible types in "yield" (actual type "datetime[Any]", expected type "DateTime")  [misc]
- src/prefect/server/schemas/schedules.py:781: error: Incompatible types in "yield" (actual type "datetime", expected type "DateTime")  [misc]
+ src/prefect/server/schemas/schedules.py:781: error: Incompatible types in "yield" (actual type "datetime[Any]", expected type "DateTime")  [misc]
- src/prefect/server/schemas/schedules.py:935: error: Incompatible default for parameter "start" (default has type "None", parameter has type "datetime")  [assignment]
+ src/prefect/server/schemas/schedules.py:935: error: Incompatible default for parameter "start" (default has type "None", parameter has type "datetime[Any]")  [assignment]
- src/prefect/server/schemas/schedules.py:936: error: Incompatible default for parameter "end" (default has type "None", parameter has type "datetime")  [assignment]
+ src/prefect/server/schemas/schedules.py:936: error: Incompatible default for parameter "end" (default has type "None", parameter has type "datetime[Any]")  [assignment]
- src/prefect/server/schemas/schedules.py:1006: error: Incompatible types in "yield" (actual type "datetime", expected type "DateTime")  [misc]
+ src/prefect/server/schemas/schedules.py:1006: error: Incompatible types in "yield" (actual type "datetime[tzinfo]", expected type "DateTime")  [misc]
- src/prefect/_internal/compatibility/deprecated.py:114: error: Item "str" of "datetime | str | Any" has no attribute "strftime"  [union-attr]
+ src/prefect/_internal/compatibility/deprecated.py:114: error: Item "str" of "datetime[Any] | str | Any" has no attribute "strftime"  [union-attr]
- src/prefect/client/schemas/objects.py:416: error: Incompatible types in assignment (expression has type "datetime", variable has type "DateTime | None")  [assignment]
+ src/prefect/client/schemas/objects.py:416: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "DateTime | None")  [assignment]
- src/prefect/states.py:358: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime | None"; expected "DateTime | None"  [arg-type]
+ src/prefect/states.py:358: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime[Any] | None"; expected "DateTime | None"  [arg-type]
- src/prefect/states.py:407: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime | None"; expected "DateTime | None"  [arg-type]
+ src/prefect/states.py:407: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime[Any] | None"; expected "DateTime | None"  [arg-type]
- src/prefect/states.py:436: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime | None"; expected "DateTime | None"  [arg-type]
+ src/prefect/states.py:436: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime[Any] | None"; expected "DateTime | None"  [arg-type]
- src/prefect/server/schemas/states.py:182: error: Incompatible types in assignment (expression has type "datetime", variable has type "DateTime | None")  [assignment]
+ src/prefect/server/schemas/states.py:182: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "DateTime | None")  [assignment]
- src/prefect/server/schemas/states.py:329: error: Incompatible types in assignment (expression has type "datetime", variable has type "DateTime | None")  [assignment]
+ src/prefect/server/schemas/states.py:329: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "DateTime | None")  [assignment]
- src/prefect/events/related.py:212: error: Incompatible types in assignment (expression has type "tuple[dict[str, str | ObjectBaseModel | None], datetime]", target has type "tuple[dict[str, str | ObjectBaseModel | None], DateTime]")  [assignment]
+ src/prefect/events/related.py:212: error: Incompatible types in assignment (expression has type "tuple[dict[str, str | ObjectBaseModel | None], datetime[Any]]", target has type "tuple[dict[str, str | ObjectBaseModel | None], DateTime]")  [assignment]
- src/prefect/events/clients.py:849: error: Incompatible types in assignment (expression has type "datetime", variable has type "DateTime | None")  [assignment]
+ src/prefect/events/clients.py:849: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "DateTime | None")  [assignment]
- src/prefect/_internal/states.py:228: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime | None"; expected "DateTime | None"  [arg-type]
+ src/prefect/_internal/states.py:228: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime[Any] | None"; expected "DateTime | None"  [arg-type]
- src/prefect/_internal/states.py:277: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime | None"; expected "DateTime | None"  [arg-type]
+ src/prefect/_internal/states.py:277: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime[Any] | None"; expected "DateTime | None"  [arg-type]
- src/prefect/_internal/states.py:306: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime | None"; expected "DateTime | None"  [arg-type]
+ src/prefect/_internal/states.py:306: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime[Any] | None"; expected "DateTime | None"  [arg-type]
- src/prefect/server/schemas/responses.py:146: error: Incompatible types in assignment (expression has type "datetime", target has type "None")  [assignment]
+ src/prefect/server/schemas/responses.py:146: error: Incompatible types in assignment (expression has type "datetime[Any]", target has type "None")  [assignment]
- src/prefect/server/events/actions.py:861: error: Argument "scheduled_time" to "Scheduled" has incompatible type "datetime"; expected "DateTime | None"  [arg-type]
+ src/prefect/server/events/actions.py:861: error: Argument "scheduled_time" to "Scheduled" has incompatible type "datetime[tzinfo]"; expected "DateTime | None"  [arg-type]
- src/prefect/deployments/runner.py:1005: error: Argument 1 to "construct_schedule" has incompatible type "**dict[str, str | Any | int | float | timedelta | datetime | None]"; expected "int | float | timedelta | None"  [arg-type]
+ src/prefect/deployments/runner.py:1005: error: Argument 1 to "construct_schedule" has incompatible type "**dict[str, str | Any | int | float | timedelta | datetime[Any] | None]"; expected "int | float | timedelta | None"  [arg-type]
- src/prefect/deployments/runner.py:1005: error: Argument 1 to "construct_schedule" has incompatible type "**dict[str, str | Any | int | float | timedelta | datetime | None]"; expected "datetime | str | None"  [arg-type]
+ src/prefect/deployments/runner.py:1005: error: Argument 1 to "construct_schedule" has incompatible type "**dict[str, str | Any | int | float | timedelta | datetime[Any] | None]"; expected "datetime[Any] | str | None"  [arg-type]
- src/prefect/deployments/runner.py:1005: error: Argument 1 to "construct_schedule" has incompatible type "**dict[str, str | Any | int | float | timedelta | datetime | None]"; expected "str | None"  [arg-type]
+ src/prefect/deployments/runner.py:1005: error: Argument 1 to "construct_schedule" has incompatible type "**dict[str, str | Any | int | float | timedelta | datetime[Any] | None]"; expected "str | None"  [arg-type]
- src/prefect/server/models/variables.py:18: error: Argument 2 to "variable_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/variables.py:18: error: Argument 2 to "variable_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/variables.py:24: error: Argument 2 to "variable_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/variables.py:24: error: Argument 2 to "variable_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/variables.py:30: error: Argument 2 to "variable_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/variables.py:30: error: Argument 2 to "variable_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/flows.py:26: error: Argument 2 to "flow_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/flows.py:26: error: Argument 2 to "flow_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/flows.py:32: error: Argument 2 to "flow_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/flows.py:32: error: Argument 2 to "flow_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/flows.py:38: error: Argument 2 to "flow_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/flows.py:38: error: Argument 2 to "flow_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/concurrency_limits_v2.py:23: error: Argument 2 to "concurrency_limit_v2_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/concurrency_limits_v2.py:23: error: Argument 2 to "concurrency_limit_v2_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/concurrency_limits_v2.py:33: error: Argument 2 to "concurrency_limit_v2_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/concurrency_limits_v2.py:33: error: Argument 2 to "concurrency_limit_v2_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/concurrency_limits_v2.py:43: error: Argument 2 to "concurrency_limit_v2_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/concurrency_limits_v2.py:43: error: Argument 2 to "concurrency_limit_v2_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/concurrency_limits.py:29: error: Argument 2 to "concurrency_limit_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/concurrency_limits.py:29: error: Argument 2 to "concurrency_limit_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/concurrency_limits.py:39: error: Argument 2 to "concurrency_limit_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/concurrency_limits.py:39: error: Argument 2 to "concurrency_limit_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/concurrency_limits.py:49: error: Argument 2 to "concurrency_limit_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/concurrency_limits.py:49: error: Argument 2 to "concurrency_limit_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/artifacts.py:25: error: Argument 2 to "artifact_collection_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/artifacts.py:25: error: Argument 2 to "artifact_collection_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/artifacts.py:35: error: Argument 2 to "artifact_collection_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/artifacts.py:35: error: Argument 2 to "artifact_collection_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/artifacts.py:45: error: Argument 2 to "artifact_collection_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/artifacts.py:45: error: Argument 2 to "artifact_collection_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/events/counting.py:103: error: Unsupported operand types for + ("datetime" and "int")  [operator]
+ src/prefect/server/events/counting.py:103: error: Unsupported operand types for + ("datetime[tzinfo]" and "int")  [operator]
- src/prefect/server/models/block_types.py:30: error: Argument 2 to "block_type_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/block_types.py:30: error: Argument 2 to "block_type_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/block_types.py:38: error: Argument 2 to "block_type_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/block_types.py:38: error: Argument 2 to "block_type_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/block_types.py:46: error: Argument 2 to "block_type_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/block_types.py:46: error: Argument 2 to "block_type_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/block_documents.py:36: error: Argument 2 to "block_document_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/block_documents.py:36: error: Argument 2 to "block_document_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/block_documents.py:46: error: Argument 2 to "block_document_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/block_documents.py:46: error: Argument 2 to "block_document_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/block_documents.py:56: error: Argument 2 to "block_document_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/block_documents.py:56: error: Argument 2 to "block_document_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/workers.py:455: error: Argument "occurred" to "work_queue_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/workers.py:455: error: Argument "occurred" to "work_queue_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/workers.py:575: error: Argument "occurred" to "work_queue_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/workers.py:575: error: Argument "occurred" to "work_queue_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/workers.py:910: error: Argument "occurred" to "work_queue_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/workers.py:910: error: Argument "occurred" to "work_queue_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/workers.py:1360: error: Argument "occurred" to "work_pool_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/workers.py:1360: error: Argument "occurred" to "work_pool_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/workers.py:1369: error: Argument "occurred" to "work_pool_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/workers.py:1369: error: Argument "occurred" to "work_pool_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/workers.py:1377: error: Argument "occurred" to "work_pool_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/workers.py:1377: error: Argument "occurred" to "work_pool_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/deployments.py:689: error: Argument "occurred" to "deployment_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/deployments.py:689: error: Argument "occurred" to "deployment_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/deployments.py:760: error: Argument "occurred" to "deployment_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/deployments.py:760: error: Argument "occurred" to "deployment_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/deployments.py:1357: error: Argument "occurred" to "deployment_status_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/deployments.py:1357: error: Argument "occurred" to "deployment_status_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/deployments.py:1422: error: Argument "occurred" to "deployment_status_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/deployments.py:1422: error: Argument "occurred" to "deployment_status_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/deployments.py:1507: error: Argument "occurred" to "deployment_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/deployments.py:1507: error: Argument "occurred" to "deployment_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/deployments.py:1526: error: Argument "occurred" to "deployment_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/deployments.py:1526: error: Argument "occurred" to "deployment_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/deployments.py:1541: error: Argument "occurred" to "deployment_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/deployments.py:1541: error: Argument "occurred" to "deployment_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/work_queues.py:751: error: Argument "occurred" to "work_queue_status_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/work_queues.py:751: error: Argument "occurred" to "work_queue_status_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/work_queues.py:789: error: Argument "occurred" to "work_queue_status_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/work_queues.py:789: error: Argument "occurred" to "work_queue_status_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/work_queues.py:809: error: Argument "occurred" to "work_queue_status_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/work_queues.py:809: error: Argument "occurred" to "work_queue_status_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/work_queues.py:829: error: Argument "occurred" to "work_queue_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/work_queues.py:829: error: Argument "occurred" to "work_queue_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/work_queues.py:844: error: Argument "occurred" to "work_queue_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/work_queues.py:844: error: Argument "occurred" to "work_queue_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/models/work_queues.py:859: error: Argument "occurred" to "work_queue_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/models/work_queues.py:859: error: Argument "occurred" to "work_queue_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/orchestration/core_policy.py:672: error: Argument "scheduled_time" to "Scheduled" has incompatible type "datetime"; expected "DateTime | None"  [arg-type]
+ src/prefect/server/orchestration/core_policy.py:672: error: Argument "scheduled_time" to "Scheduled" has incompatible type "datetime[Any]"; expected "DateTime | None"  [arg-type]
- src/prefect/server/orchestration/core_policy.py:1124: error: Argument "scheduled_time" to "AwaitingRetry" has incompatible type "datetime"; expected "DateTime | None"  [arg-type]
+ src/prefect/server/orchestration/core_policy.py:1124: error: Argument "scheduled_time" to "AwaitingRetry" has incompatible type "datetime[Any]"; expected "DateTime | None"  [arg-type]
- src/prefect/server/orchestration/core_policy.py:1142: error: Argument "scheduled_time" to "AwaitingRetry" has incompatible type "datetime"; expected "DateTime | None"  [arg-type]
+ src/prefect/server/orchestration/core_policy.py:1142: error: Argument "scheduled_time" to "AwaitingRetry" has incompatible type "datetime[Any]"; expected "DateTime | None"  [arg-type]
- src/prefect/server/orchestration/core_policy.py:1200: error: Argument "scheduled_time" to "AwaitingRetry" has incompatible type "datetime"; expected "DateTime | None"  [arg-type]
+ src/prefect/server/orchestration/core_policy.py:1200: error: Argument "scheduled_time" to "AwaitingRetry" has incompatible type "datetime[Any]"; expected "DateTime | None"  [arg-type]
- src/prefect/server/events/models/automations.py:33: error: Argument 2 to "automation_created_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/events/models/automations.py:33: error: Argument 2 to "automation_created_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/events/models/automations.py:41: error: Argument 2 to "automation_updated_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/events/models/automations.py:41: error: Argument 2 to "automation_updated_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/events/models/automations.py:49: error: Argument 2 to "automation_deleted_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/events/models/automations.py:49: error: Argument 2 to "automation_deleted_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/services/cancellation_cleanup.py:95: error: Argument "when" to "schedule_cancelling_timeout_check" has incompatible type "timedelta"; expected "datetime"  [arg-type]
+ src/prefect/server/services/cancellation_cleanup.py:95: error: Argument "when" to "schedule_cancelling_timeout_check" has incompatible type "timedelta"; expected "datetime[Any]"  [arg-type]
- src/prefect/server/events/triggers.py:758: error: Argument 1 to "periodic_evaluation" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/events/triggers.py:758: error: Argument 1 to "periodic_evaluation" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/events/triggers.py:898: error: Incompatible return value type (got "tuple[datetime | None, Any | int]", expected "tuple[DateTime | None, int]")  [return-value]
+ src/prefect/server/events/triggers.py:898: error: Incompatible return value type (got "tuple[datetime[Any] | None, Any | int]", expected "tuple[DateTime | None, int]")  [return-value]
- src/prefect/server/events/triggers.py:1443: error: Incompatible types in assignment (expression has type "datetime", variable has type "timedelta")  [assignment]
+ src/prefect/server/events/triggers.py:1443: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "timedelta")  [assignment]
- src/prefect/server/events/triggers.py:1465: error: Argument 2 to "proactive_evaluation" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/events/triggers.py:1465: error: Argument 2 to "proactive_evaluation" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/task_engine.py:367: error: Incompatible types in assignment (expression has type "datetime", variable has type "DateTime | None")  [assignment]
+ src/prefect/task_engine.py:367: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "DateTime | None")  [assignment]
- src/prefect/task_engine.py:525: error: Incompatible types in assignment (expression has type "datetime", variable has type "DateTime | None")  [assignment]
+ src/prefect/task_engine.py:525: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "DateTime | None")  [assignment]
- src/prefect/task_engine.py:593: error: Incompatible types in assignment (expression has type "datetime", variable has type "DateTime | None")  [assignment]
+ src/prefect/task_engine.py:593: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "DateTime | None")  [assignment]
- src/prefect/task_engine.py:657: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime | None"; expected "DateTime | None"  [arg-type]
+ src/prefect/task_engine.py:657: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime[Any] | None"; expected "DateTime | None"  [arg-type]
- src/prefect/task_engine.py:1253: error: Incompatible types in assignment (expression has type "datetime", variable has type "DateTime | None")  [assignment]
+ src/prefect/task_engine.py:1253: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "DateTime | None")  [assignment]
- src/prefect/task_engine.py:1316: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime | None"; expected "DateTime | None"  [arg-type]
+ src/prefect/task_engine.py:1316: error: Argument "expiration" to "create_result_record" of "ResultStore" has incompatible type "datetime[Any] | None"; expected "DateTime | None"  [arg-type]
- src/prefect/server/api/workers.py:491: error: Argument "occurred" to "emit_work_pool_status_event" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/api/workers.py:491: error: Argument "occurred" to "emit_work_pool_status_event" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/api/workers.py:1151: error: Argument "work_pool_updated" to "WorkerChannelConnection" has incompatible type "DateTime | None"; expected "datetime"  [arg-type]
+ src/prefect/server/api/workers.py:1151: error: Argument "work_pool_updated" to "WorkerChannelConnection" has incompatible type "DateTime | None"; expected "datetime[Any]"  [arg-type]
- src/prefect/task_worker.py:288: error: Incompatible types in assignment (expression has type "datetime", target has type "DateTime")  [assignment]
+ src/prefect/task_worker.py:288: error: Incompatible types in assignment (expression has type "datetime[Any]", target has type "DateTime")  [assignment]
- src/prefect/task_worker.py:418: error: Incompatible types in assignment (expression has type "datetime", variable has type "DateTime | None")  [assignment]
+ src/prefect/task_worker.py:418: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "DateTime | None")  [assignment]
- src/prefect/server/api/flow_runs.py:540: error: Argument "scheduled_time" to "Scheduled" has incompatible type "datetime"; expected "DateTime | None"  [arg-type]
+ src/prefect/server/api/flow_runs.py:540: error: Argument "scheduled_time" to "Scheduled" has incompatible type "datetime[Any]"; expected "DateTime | None"  [arg-type]
- src/prefect/server/api/ui/flows.py:43: error: Incompatible return value type (got "datetime", expected "DateTime")  [return-value]
+ src/prefect/server/api/ui/flows.py:43: error: Incompatible return value type (got "datetime[Any]", expected "DateTime")  [return-value]
- src/prefect/runtime/flow_run.py:80: error: Dict entry 4 has incompatible type "type[datetime]": "Callable[[str], datetime]"; expected "type[int] | type[float] | type[str] | type[None] | type[DateTime]": "Callable[[Any], Any]"  [dict-item]
+ src/prefect/runtime/flow_run.py:80: error: Dict entry 4 has incompatible type "type[datetime[Any]]": "Callable[[str], datetime[Any]]"; expected "type[int] | type[float] | type[str] | type[None] | type[DateTime]": "Callable[[Any], Any]"  [dict-item]
- src/prefect/runtime/flow_run.py:232: error: Incompatible return value type (got "datetime", expected "DateTime")  [return-value]
+ src/prefect/runtime/flow_run.py:232: error: Incompatible return value type (got "datetime[Any]", expected "DateTime")  [return-value]
- src/prefect/testing/fixtures.py:235: error: Incompatible return value type (got "datetime", expected "DateTime")  [return-value]
+ src/prefect/testing/fixtures.py:235: error: Incompatible return value type (got "datetime[Any]", expected "DateTime")  [return-value]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:116: error: Argument "current_time" to "_prune_completed_idempotency_locked" of "WorkerCleanupQueue" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:116: error: Argument "current_time" to "_prune_completed_idempotency_locked" of "WorkerCleanupQueue" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:182: error: Argument "current_time" to "_expire_due_leases_locked" of "WorkerCleanupQueue" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:182: error: Argument "current_time" to "_expire_due_leases_locked" of "WorkerCleanupQueue" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:214: error: Argument "current_time" to "_move_to_dead_letter_locked" of "WorkerCleanupQueue" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:214: error: Argument "current_time" to "_move_to_dead_letter_locked" of "WorkerCleanupQueue" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:228: error: Argument "lease_expires_at" to "_Reservation" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:228: error: Argument "lease_expires_at" to "_Reservation" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:229: error: Argument "reserved_at" to "_Reservation" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:229: error: Argument "reserved_at" to "_Reservation" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:273: error: Argument "current_time" to "_validate_current_reservation_locked" of "WorkerCleanupQueue" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:273: error: Argument "current_time" to "_validate_current_reservation_locked" of "WorkerCleanupQueue" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:287: error: Argument "completed_at" to "_AckedMessage" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:287: error: Argument "completed_at" to "_AckedMessage" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:326: error: Argument "current_time" to "_validate_current_reservation_locked" of "WorkerCleanupQueue" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:326: error: Argument "current_time" to "_validate_current_reservation_locked" of "WorkerCleanupQueue" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:341: error: Argument "current_time" to "_move_to_dead_letter_locked" of "WorkerCleanupQueue" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:341: error: Argument "current_time" to "_move_to_dead_letter_locked" of "WorkerCleanupQueue" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:390: error: Argument "current_time" to "_validate_current_reservation_locked" of "WorkerCleanupQueue" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:390: error: Argument "current_time" to "_validate_current_reservation_locked" of "WorkerCleanupQueue" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:404: error: Argument "lease_expires_at" to "_Reservation" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:404: error: Argument "lease_expires_at" to "_Reservation" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/server/worker_communication/cleanup_queue/memory.py:436: error: Argument "current_time" to "_expire_due_leases_locked" of "WorkerCleanupQueue" has incompatible type "datetime"; expected "DateTime"  [arg-type]
+ src/prefect/server/worker_communication/cleanup_queue/memory.py:436: error: Argument "current_time" to "_expire_due_leases_locked" of "WorkerCleanupQueue" has incompatible type "datetime[Any]"; expected "DateTime"  [arg-type]
- src/prefect/cli/deployment.py:811: error: Value of "anchor_date" has incompatible type "datetime"; expected "str"  [typeddict-item]
+ src/prefect/cli/deployment.py:811: error: Value of "anchor_date" has incompatible type "datetime[Any]"; expected "str"  [typeddict-item]
- src/prefect/cli/deploy/_schedules.py:70: error: Argument 1 to "IntervalSchedule" has incompatible type "**dict[str, timedelta | Any | datetime]"; expected "timedelta"  [arg-type]
+ src/prefect/cli/deploy/_schedules.py:70: error: Argument 1 to "IntervalSchedule" has incompatible type "**dict[str, timedelta | Any | datetime[Any]]"; expected "timedelta"  [arg-type]
- src/prefect/cli/deploy/_schedules.py:70: error: Argument 1 to "IntervalSchedule" has incompatible type "**dict[str, timedelta | Any | datetime]"; expected "DateTime | datetime | str | None"  [arg-type]
+ src/prefect/cli/deploy/_schedules.py:70: error: Argument 1 to "IntervalSchedule" has incompatible type "**dict[str, timedelta | Any | datetime[Any]]"; expected "DateTime | datetime[Any] | str | None"  [arg-type]
- src/prefect/cli/deploy/_schedules.py:70: error: Argument 1 to "IntervalSchedule" has incompatible type "**dict[str, timedelta | Any | datetime]"; expected "str | None"  [arg-type]
+ src/prefect/cli/deploy/_schedules.py:70: error: Argument 1 to "IntervalSchedule" has incompatible type "**dict[str, timedelta | Any | datetime[Any]]"; expected "str | None"  [arg-type]
- src/prefect/cli/work_queue.py:741: error: Unsupported operand types for > ("datetime" and "None")  [operator]
+ src/prefect/cli/work_queue.py:741: error: No overload variant of "__gt__" of "datetime" matches argument type "None"  [operator]
+ src/prefect/cli/work_queue.py:741: note: Possible overload variants:
+ src/prefect/cli/work_queue.py:741: note:     def __gt__(self, datetime[tzinfo] | datetime[tzinfo | None], /) -> bool
+ src/prefect/cli/work_queue.py:741: note:     def __gt__(self, datetime[None] | datetime[tzinfo | None], /) -> bool
+ src/prefect/cli/work_queue.py:741: note:     def __gt__(self, datetime[Any], /) -> Never

aiohttp (https://github.com/aio-libs/aiohttp)
+ aiohttp/web_request.py:542:5: error: Type of decorated function contains type "Any" ("under_cached_property[datetime[Any] | None]")  [misc]
+ aiohttp/web_request.py:550:5: error: Type of decorated function contains type "Any" ("under_cached_property[datetime[Any] | None]")  [misc]
+ aiohttp/web_request.py:604:5: error: Type of decorated function contains type "Any" ("under_cached_property[datetime[Any] | ETag | None]")  [misc]

nionutils (https://github.com/nion-software/nionutils)
+ nion/utils/test/DateTime_test.py:31: error: "object" has no attribute "isoformat"  [attr-defined]
+ nion/utils/test/DateTime_test.py:32: error: Argument 1 to "get_windows_filetime_from_datetime" has incompatible type "object"; expected "datetime[Any]"  [arg-type]
+ nion/utils/test/DateTime_test.py:36: error: "object" has no attribute "tzinfo"  [attr-defined]
+ nion/utils/test/DateTime_test.py:38: error: "object" has no attribute "replace"  [attr-defined]
+ nion/utils/test/DateTime_test.py:40: error: "object" has no attribute "astimezone"  [attr-defined]
+ nion/utils/test/DateTime_test.py:45: error: "object" has no attribute "tzinfo"  [attr-defined]
+ nion/utils/test/DateTime_test.py:47: error: "object" has no attribute "replace"  [attr-defined]
+ nion/utils/test/DateTime_test.py:49: error: "object" has no attribute "astimezone"  [attr-defined]

apprise (https://github.com/caronc/apprise)
- apprise/asset.py:375: error: Incompatible types in assignment (expression has type "tzinfo | None", variable has type "None")  [assignment]
+ apprise/asset.py:375: error: Incompatible types in assignment (expression has type "tzinfo", variable has type "None")  [assignment]
- apprise/persistent_store.py:132: error: Incompatible types in assignment (expression has type "datetime", variable has type "None")  [assignment]
+ apprise/persistent_store.py:132: error: Incompatible types in assignment (expression has type "datetime[tzinfo]", variable has type "None")  [assignment]
- apprise/persistent_store.py:140: error: Incompatible types in assignment (expression has type "datetime", variable has type "None")  [assignment]
+ apprise/persistent_store.py:140: error: Incompatible types in assignment (expression has type "datetime[tzinfo]", variable has type "None")  [assignment]
- apprise/persistent_store.py:143: error: Incompatible types in assignment (expression has type "datetime", variable has type "None")  [assignment]
+ apprise/persistent_store.py:143: error: Incompatible types in assignment (expression has type "datetime[tzinfo]", variable has type "None")  [assignment]
- apprise/persistent_store.py:1429: error: Incompatible types in assignment (expression has type "datetime", variable has type "int | float | None")  [assignment]
+ apprise/persistent_store.py:1429: error: Incompatible types in assignment (expression has type "datetime[None]", variable has type "int | float | None")  [assignment]
- apprise/persistent_store.py:1528: error: Unsupported operand types for > ("datetime" and "None")  [operator]
+ apprise/persistent_store.py:1528: error: No overload variant of "__gt__" of "datetime" matches argument type "None"  [operator]
+ apprise/persistent_store.py:1528: note: Possible overload variants:
+ apprise/persistent_store.py:1528: note:     def __gt__(self, datetime[None] | datetime[tzinfo | None], /) -> bool
+ apprise/persistent_store.py:1528: note:     def __gt__(self, datetime[Any], /) -> Never
- apprise/persistent_store.py:1528: error: Unsupported operand types for < ("int" and "datetime")  [operator]
+ apprise/persistent_store.py:1528: error: Unsupported operand types for < ("int" and "datetime[None]")  [operator]
- apprise/persistent_store.py:1528: error: Unsupported operand types for < ("float" and "datetime")  [operator]
+ apprise/persistent_store.py:1528: error: Unsupported operand types for < ("float" and "datetime[None]")  [operator]

zulip (https://github.com/zulip/zulip)
+ zerver/tests/test_timestamp.py:80: error: Incompatible types in assignment (expression has type "datetime[None]", variable has type "datetime[tzinfo]")  [assignment]

kopf (https://github.com/nolar/kopf)
+ kopf/_core/actions/progression.py:133: error: Returning Any from function declared to return "timedelta"  [no-any-return]

core (https://github.com/home-assistant/core)
+ homeassistant/components/braviatv/coordinator.py:254: error: Statement is unreachable  [unreachable]
+ homeassistant/components/calendar/trigger.py:119: error: Returning Any from function declared to return "bool"  [no-any-return]
+ homeassistant/components/evohome/storage.py:100: error: Incompatible types in assignment (expression has type "datetime[tzinfo] | datetime[None]", variable has type "datetime[None]")  [assignment]
+ homeassistant/components/sensor/recorder.py:195: error: Returning Any from function declared to return "float"  [no-any-return]
+ homeassistant/components/sun/condition.py:132: error: Returning Any from function declared to return "bool"  [no-any-return]
+ homeassistant/components/tibber/coordinator.py:340: error: Incompatible types in assignment (expression has type "datetime[tzinfo]", variable has type "datetime[None]")  [assignment]
+ homeassistant/components/rituals_perfume_genie/coordinator.py:265: error: Returning Any from function declared to return "bool"  [no-any-return]
+ homeassistant/components/tod/binary_sensor.py:150: error: Returning Any from function declared to return "bool"  [no-any-return]
- homeassistant/components/xbox/coordinator.py:317: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/xbox/coordinator.py:317: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/xbox/coordinator.py:319: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/xbox/coordinator.py:319: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
+ homeassistant/components/alexa/auth.py:113: error: Returning Any from function declared to return "bool"  [no-any-return]
+ homeassistant/components/calendar/__init__.py:221: error: Returning Any from function declared to return "bool"  [no-any-return]
+ homeassistant/components/recorder/models/state.py:73: error: Unused "type: ignore" comment  [unused-ignore]
+ homeassistant/components/recorder/models/state.py:81: error: Unused "type: ignore" comment  [unused-ignore]
+ homeassistant/helpers/condition/conditions.py:290: error: Returning Any from function declared to return "bool"  [no-any-return]
+ homeassistant/helpers/sun.py:161: error: Returning Any from function declared to return "bool"  [no-any-return]
+ homeassistant/components/history_stats/helpers.py:85: error: Returning Any from function declared to return "float"  [no-any-return]
+ homeassistant/components/jewish_calendar/services.py:58: error: Returning Any from function declared to return "bool"  [no-any-return]
+ homeassistant/components/derivative/sensor.py:308: error: Returning Any from function declared to return "float"  [no-any-return]
- homeassistant/components/alexa_devices/media_player.py:209: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/alexa_devices/media_player.py:209: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/data_grand_lyon/sensor.py:44: error: Returning Any from function declared to return "datetime"  [no-any-return]
+ homeassistant/components/data_grand_lyon/sensor.py:44: error: Returning Any from function declared to return "datetime[Any]"  [no-any-return]
- homeassistant/components/data_grand_lyon/sensor.py:45: error: Returning Any from function declared to return "datetime"  [no-any-return]
+ homeassistant/components/data_grand_lyon/sensor.py:45: error: Returning Any from function declared to return "datetime[Any]"  [no-any-return]
- homeassistant/components/jewish_calendar/sensor.py:305: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/jewish_calendar/sensor.py:305: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/russound_rio/media_player.py:197: error: Returning Any from function declared to return "datetime"  [no-any-return]
+ homeassistant/components/russound_rio/media_player.py:197: error: Returning Any from function declared to return "datetime[Any]"  [no-any-return]
+ homeassistant/components/statistics/sensor.py:1078: error: Incompatible types in assignment (expression has type "datetime[tzinfo]", variable has type "datetime[None]")  [assignment]
- homeassistant/components/easyenergy/services.py:161: error: Returning Any from function declared to return "list[dict[str, float | datetime]]"  [no-any-return]
+ homeassistant/components/easyenergy/services.py:161: error: Returning Any from function declared to return "list[dict[str, float | datetime[Any]]]"  [no-any-return]
- homeassistant/components/hortimax/sensor.py:276: error: Returning Any from function declared to return "float | str | datetime | None"  [no-any-return]
+ homeassistant/components/hortimax/sensor.py:276: error: Returning Any from function declared to return "float | str | datetime[Any] | None"  [no-any-return]
- homeassistant/components/unifiprotect/sensor.py:100: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/unifiprotect/sensor.py:100: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/unifiprotect/sensor.py:610: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/unifiprotect/sensor.py:610: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
+ homeassistant/components/onvif/device.py:293: error: Need type annotation for "dt_diff"  [var-annotated]
+ homeassistant/components/roborock/coordinator.py:363: error: Returning Any from function declared to return "bool"  [no-any-return]
- homeassistant/components/cambridge_audio/media_player.py:188: error: Returning Any from function declared to return "datetime"  [no-any-return]
+ homeassistant/components/cambridge_audio/media_player.py:188: error: Returning Any from function declared to return "datetime[Any]"  [no-any-return]
- homeassistant/components/discovergy/sensor.py:37: error: Returning Any from function declared to return "datetime | float | None"  [no-any-return]
+ homeassistant/components/discovergy/sensor.py:37: error: Returning Any from function declared to return "datetime[Any] | float | None"  [no-any-return]
- homeassistant/components/ecowitt/sensor.py:368: error: Returning Any from function declared to return "str | int | float | None | datetime"  [no-any-return]
+ homeassistant/components/ecowitt/sensor.py:368: error: Returning Any from function declared to return "str | int | float | None | datetime[Any]"  [no-any-return]
- homeassistant/components/my_pv/sensor.py:258: error: Returning Any from function declared to return "str | int | float | None | date | datetime | Decimal"  [no-any-return]
+ homeassistant/components/my_pv/sensor.py:258: error: Returning Any from function declared to return "str | int | float | None | date | datetime[Any] | Decimal"  [no-any-return]
- homeassistant/components/roku/media_player.py:235: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/roku/media_player.py:235: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
+ homeassistant/components/local_calendar/calendar.py:283: note:     def __sub__(self, datetime[tzinfo] | datetime[tzinfo | None], /) -> timedelta
+ homeassistant/components/local_calendar/calendar.py:283: note:     def __sub__(self, datetime[None] | datetime[tzinfo | None], /) -> timedelta
- homeassistant/components/local_calendar/calendar.py:283: note:     def __sub__(self, datetime, /) -> timedelta
+ homeassistant/components/local_calendar/calendar.py:283: note:     def __sub__(self, datetime[Any], /) -> Never
- homeassistant/components/local_calendar/calendar.py:283: note:     def __sub__(self, timedelta, /) -> datetime
+ homeassistant/components/local_calendar/calendar.py:283: note:     def __sub__(self, timedelta, /) -> datetime[Any]
+ homeassistant/components/filter/sensor.py:757: error: Returning Any from function declared to return "float"  [no-any-return]
- homeassistant/components/wattwaechter/sensor.py:697: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/wattwaechter/sensor.py:697: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/vallox/sensor.py:69: error: Returning Any from function declared to return "str | int | float | None | datetime"  [no-any-return]
+ homeassistant/components/vallox/sensor.py:69: error: Returning Any from function declared to return "str | int | float | None | datetime[Any]"  [no-any-return]
- homeassistant/components/esphome/sensor.py:119: error: Returning Any from function declared to return "datetime | int | float | None"  [no-any-return]
+ homeassistant/components/esphome/sensor.py:119: error: Returning Any from function declared to return "datetime[Any] | int | float | None"  [no-any-return]
- homeassistant/components/esphome/sensor.py:150: error: Returning Any from function declared to return "str | datetime | date | None"  [no-any-return]
+ homeassistant/components/esphome/sensor.py:150: error: Returning Any from function declared to return "str | datetime[Any] | date | None"  [no-any-return]
- homeassistant/components/yoto/media_player.py:128: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/yoto/media_player.py:128: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/nest/camera.py:236: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/nest/camera.py:236: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/nest/camera.py:283: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/nest/camera.py:283: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/nest/sensor.py:143: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/nest/sensor.py:143: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/dlna_dmr/media_player.py:986: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/dlna_dmr/media_player.py:986: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
+ homeassistant/components/knx/datetime.py:97: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]
- homeassistant/components/knx/datetime.py:97: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
- homeassistant/components/lyngdorf/media_player.py:414: error: Returning Any from function declared to return "datetime | None"  [no-any-return]
+ homeassistant/components/lyngdorf/media_player.py:414: error: Returning Any from function declared to return "datetime[Any] | None"  [no-any-return]

discord.py (https://github.com/Rapptz/discord.py)
- discord/embeds.py:362: error: Incompatible types in assignment (expression has type "None", variable has type "datetime")  [assignment]
+ discord/embeds.py:362: error: Incompatible types in assignment (expression has type "None", variable has type "datetime[tzinfo] | datetime[Any]")  [assignment]
- discord/member.py:154: note:     def parse_time(timestamp: str) -> datetime
+ discord/member.py:154: note:     def parse_time(timestamp: str) -> datetime[Any]
- discord/member.py:154: note:     def parse_time(timestamp: str | None) -> datetime | None
+ discord/member.py:154: note:     def parse_time(timestamp: str | None) -> datetime[Any] | None
- discord/guild.py:4712: note:     def parse_time(timestamp: str) -> datetime
+ discord/guild.py:4712: note:     def parse_time(timestamp: str) -> datetime[Any]
- discord/guild.py:4712: note:     def parse_time(timestamp: str | None) -> datetime | None
+ discord/guild.py:4712: note:     def parse_time(timestamp: str | None) -> datetime[Any] | None
- discord/guild.py:4723: note:     def parse_time(timestamp: str) -> datetime
+ discord/guild.py:4723: note:     def parse_time(timestamp: str) -> datetime[Any]
- discord/guild.py:4723: note:     def parse_time(timestamp: str | None) -> datetime | None
+ discord/guild.py:4723: note:     def parse_time(timestamp: str | None) -> datetime[Any] | None
- discord/ext/tasks/__init__.py:213: error: Incompatible types in assignment (expression has type "datetime", variable has type "None")  [assignment]
+ discord/ext/tasks/__init__.py:213: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "None")  [assignment]
- discord/ext/tasks/__init__.py:215: error: Incompatible types in assignment (expression has type "datetime", variable has type "None")  [assignment]
+ discord/ext/tasks/__init__.py:215: error: Incompatible types in assignment (expression has type "datetime[tzinfo]", variable has type "None")  [assignment]
- discord/ext/tasks/__init__.py:223: error: Argument 1 to "_try_sleep_until" of "Loop" has incompatible type "None"; expected "datetime"  [arg-type]
+ discord/ext/tasks/__init__.py:223: error: Argument 1 to "_try_sleep_until" of "Loop" has incompatible type "None"; expected "datetime[Any]"  [arg-type]
- discord/ext/tasks/__init__.py:225: error: Incompatible types in assignment (expression has type "None", variable has type "datetime")  [assignment]
+ discord/ext/tasks/__init__.py:225: error: Incompatible types in assignment (expression has type "None", variable has type "datetime[Any]")  [assignment]
- discord/ext/tasks/__init__.py:226: error: Incompatible types in assignment (expression has type "datetime", variable has type "None")  [assignment]
+ discord/ext/tasks/__init__.py:226: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "None")  [assignment]
- discord/ext/tasks/__init__.py:232: error: Unsupported operand types for >= ("datetime" and "None")  [operator]
+ discord/ext/tasks/__init__.py:232: error: No overload variant of "__ge__" of "datetime" matches argument type "None"  [operator]
+ discord/ext/tasks/__init__.py:232: note: Possible overload variants:
+ discord/ext/tasks/__init__.py:232: note:     def __ge__(self, datetime[tzinfo] | datetime[tzinfo | None], /) -> bool
+ discord/ext/tasks/__init__.py:232: note:     def __ge__(self, datetime[None] | datetime[tzinfo | None], /) -> bool
+ discord/ext/tasks/__init__.py:232: note:     def __ge__(self, datetime[Any], /) -> Never
- discord/ext/tasks/__init__.py:243: error: Argument 1 to "_try_sleep_until" of "Loop" has incompatible type "None"; expected "datetime"  [arg-type]
+ discord/ext/tasks/__init__.py:243: error: Argument 1 to "_try_sleep_until" of "Loop" has incompatible type "None"; expected "datetime[Any]"  [arg-type]
- discord/ext/tasks/__init__.py:244: error: Incompatible types in assignment (expression has type "datetime", variable has type "None")  [assignment]
+ discord/ext/tasks/__init__.py:244: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "None")  [assignment]
- discord/ext/tasks/__init__.py:267: error: Argument 1 to "_try_sleep_until" of "Loop" has incompatible type "None"; expected "datetime"  [arg-type]
+ discord/ext/tasks/__init__.py:267: error: Argument 1 to "_try_sleep_until" of "Loop" has incompatible type "None"; expected "datetime[Any]"  [arg-type]
- discord/ext/tasks/__init__.py:791: error: Incompatible types in assignment (expression has type "datetime", variable has type "None")  [assignment]
+ discord/ext/tasks/__init__.py:791: error: Incompatible types in assignment (expression has type "datetime[Any]", variable has type "None")  [assignment]
- discord/ext/tasks/__init__.py:794: error: Argument 1 to "recalculate" of "SleepHandle" has incompatible type "None"; expected "datetime"  [arg-type]
+ discord/ext/tasks/__init__.py:794: error: Argument 1 to "recalculate" of "SleepHandle" has incompatible type "None"; expected "datetime[Any]"  [arg-type]

psycopg (https://github.com/psycopg/psycopg)
+ psycopg/psycopg/types/datetime.py:574: error: Incompatible types in assignment (expression has type "datetime[None]", variable has type "datetime[tzinfo]")  [assignment]

pandera (https://github.com/pandera-dev/pandera)
- pandera/engines/pandas_engine.py:171: note:     def array(data: Sequence[Just[float] | str | datetime | datetime64[Any] | NaTType | None] | ndarray[tuple[Any, ...], dtype[Any]] | DatetimeArray, dtype: DatetimeTZDtype | Literal['datetime64[s, UTC]', 'datetime64[ms, UTC]', 'datetime64[us, UTC]', 'datetime64[ns, UTC]'] | dtype[datetime64[Any]] | Literal['datetime64[s]', 'datetime64[ms]', 'datetime64[us]', 'datetime64[ns]', 'M8[s]', 'M8[ms]', 'M8[us]', 'M8[ns]', '<M8[s]', '<M8[ms]', '<M8[us]', '<M8[ns]'] | dtype[datetime64[Any]], copy: bool = ...) -> DatetimeArray
+ pandera/engines/pandas_engine.py:171: note:     def array(data: Sequence[Just[float] | str | datetime[Any] | datetime64[Any] | NaTType | None] | ndarray[tuple[Any, ...], dtype[Any]] | DatetimeArray, dtype: DatetimeTZDtype | Literal['datetime64[s, UTC]', 'datetime64[ms, UTC]', 'datetime64[us, UTC]', 'datetime64[ns, UTC]'] | dtype[datetime64[Any]] | Literal['datetime64[s]', 'datetime64[ms]', 'datetime64[us]', 'datetime64[ns]', 'M8[s]', 'M8[ms]', 'M8[us]', 'M8[ns]', '<M8[s]', '<M8[ms]', '<M8[us]', '<M8[ns]'] | dtype[datetime64[Any]], copy: bool = ...) -> DatetimeArray
- pandera/engines/pandas_engine.py:171: note:     def array(data: Sequence[datetime | datetime64[Any] | NaTType | None] | ndarray[tuple[Any, ...], dtype[datetime64[Any]]] | DatetimeArray, dtype: None = ..., copy: bool = ...) -> DatetimeArray
+ pandera/engines/pandas_engine.py:171: note:     def array(data: Sequence[datetime[Any] | datetime64[Any] | NaTType | None] | ndarray[tuple[Any, ...], dtype[datetime64[Any]]] | DatetimeArray, dtype: None = ..., copy: bool = ...) -> DatetimeArray
- pandera/engines/pandas_engine.py:171: note:     def array(data: Sequence[datetime | datetime64[Any] | NaTType | None] | ndarray[tuple[Any, ...]

... (truncated 274 lines) ...

srittau · 2026-10-29T14:12:44Z

I think this is now in good shape. As far as I can see, the primer hits are now mostly either naive and tz-aware datetimes assigned to the same variable (which is churn, but unavoidable, and splitting is a good practice), and returning Any warnings due to datetime now being datetime[Any].

Make datetime generic over tzinfo

4c32d0c

pre-commit-ci Bot and others added 2 commits April 29, 2024 11:59

[pre-commit.ci] auto fixes from pre-commit.com hooks

e2a3800

Ignore stubtest error

814df90

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srittau added 5 commits April 29, 2024 14:20

Overload operators

a5492ba

Update some type ignores

d176a1d

Ignore some mypy errors

040dbcb

Make pyright a bit happier

7ce96ea

Add another type ignore

ce3ee77

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srittau added 3 commits April 29, 2024 14:47

Make pyright mostly happy

c59db10

Set default to Any

c0d5cc1

Make both, pyright and mypy happy

eb4f7d8

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srittau added 2 commits April 29, 2024 14:58

Annotate datetime.today()

14aa5d2

Use explicit datetime annotation in test

d8d9d41

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Revert bound, use covariance

f656dbb

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Annotate datetime.strptime()

25a3e48

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srittau added 2 commits April 29, 2024 15:53

Reshuffle annotations; use Any as default again

ce3c470

Add some type ignores

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srittau mentioned this pull request Apr 11, 2025

Distinguish between datetime.datetime objects with a timezone and those without python/typing#1962

Open

srittau mentioned this pull request Nov 9, 2025

Safer types for datetime #14999

Open

bluetech reviewed Jan 26, 2026

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Comment thread stdlib/datetime.pyi

Comment thread stdlib/datetime.pyi

Comment thread stdlib/datetime.pyi Outdated

Comment thread stubs/python-dateutil/@tests/test_cases/check_inheritance.py

m-aciek mentioned this pull request Feb 21, 2026

I want to be able to declare "naive datetime" or "aware datetime" as types python/mypy#10067

Open

xmo-odoo reviewed Sep 30, 2026

View reviewed changes

srittau and others added 4 commits October 28, 2026 21:11

Merge branch 'main' into datetime-tzinfo

c57ace3

[pre-commit.ci] auto fixes from pre-commit.com hooks

94cd215

Fix merge problems

ae727f4

[pre-commit.ci] auto fixes from pre-commit.com hooks

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srittau and others added 6 commits October 28, 2026 21:34

Change _TzInfoT default to tzinfo | None

2683f1b

This should be compatible with the old code.

Use datetime[None] for datetime.{min,max}

86b5ced

Also make `Final`

Remove datetime.fromisoformat() override

73d99dc

Return datetime[_TzInfo] from astimezone()

147cfa8

`NoReturn` -> `Never`

[pre-commit.ci] auto fixes from pre-commit.com hooks

2df8134

Revert Final change

e2efb0e

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srittau added 3 commits October 28, 2026 22:18

Use datetime[_TzInfo] | datetime[None] as strptime() return type

79e966e

Use Any default for _TzInfoT

9d1f57a

Return datetime from fromisoformat

15cd3aa

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srittau added 2 commits October 29, 2026 14:22

Split fromisoformat datetime union

45db0fb

Update a test

d95f348

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Remove special casing of datetime.strptime()

0e3099c

Now it should return `Self`, which means `datetime[Any]` for plain `datetime` objects. Since the format string is user defined, callers usually know whether the returned datetime object is naive or tz-aware, so a union can be overly strict.

srittau added 2 commits October 29, 2026 14:45

Restore explicit datetime.strptime with changed return type

ebf7984

Fix missing import

d515efb

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Add an extra overload to datetime.fromtimestamp

8b0f3a4

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srittau commented Oct 29, 2026

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