PyQt6 6.10.2: .pyi stubs use Any and collections.abc without importing them.

[Dragan A.]

Hi,

The type stubs shipped with PyQt6 6.10.2 reference names they don't import.
In strict mode Pyright then reports every signal connect(),
QTimer.singleShot()
and pyqtSlot() use as partially unknown. In our project that is about 1,000
errors.

Environment:
  PyQt6 6.10.2, PyQt6-Qt6 6.10.2, PyQt6-sip 13.13.0
  Python 3.14.8, Windows 11
  Pyright 1.1.414

Problems in PyQt6/QtCore.pyi:

1. Any is used but never imported (line 78):
     PYQT_SLOT = typing.Union[collections.abc.Callable[..., Any],
pyqtBoundSignal]

2. collections.abc is used, but only "collections" is imported (line 23):
     import collections, re, typing, enum
   so collections.abc.Callable does not resolve (lines 68, 69, 78).
   The same applies to the other .pyi files that use collections.abc.

3. *types in pyqtSlot() has no annotation (line 69):
     def pyqtSlot(*types, name: typing.Optional[str] = ..., result: ...) ->
...

4. __eq__ has no return type (QDate, line 3491, and other classes):
     def __eq__(self, other: object): ...

To reproduce, with only PyQt6 6.10.2 and pyright installed:
  pip install PyQt6==6.10.2 pyright
  pyright pyqt6_stub_repro.py      (attached)

Output:
  2:62  error: Type of "pyqtSlot" is partially unknown
          Type of "pyqtSlot" is "(*types: Unknown, name: str | None = ...,
          result: str | None = ...) -> Unknown"
  10:6  error: Untyped function decorator obscures type of function
  17:1  error: Type of "connect" is partially unknown
          Type of "connect" is "(slot: Unknown | pyqtBoundSignal) ->
Connection"
  18:1  error: Type of "singleShot" is partially unknown
  20:1  error: Type of "same_day" is unknown
  21:7  error: Argument type is unknown
  6 errors

Adding "from typing import Any" and "import collections.abc" to the .pyi
files removes almost all of them. Annotating *types (e.g. *types: Any) and
adding "-> bool" to __eq__/__ne__ fixes the rest.

Thanks,
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