Bug report

Bug description:

fromtypingimportTYPE_CHECKINGfromunittest.mockimportcreate_autospecifTYPE_CHECKING:fromfooimportFoodefbar(x:Foo)->None:passcreate_autospec(bar)

This will result inNameError: name 'Foo' is not defined because_get_signature_object inunittest.mock callsinspect.signature without explicitly passingannotation_format, so it defaults toFormat.VALUE.

Sincecreate_autospec really shouldn't care whether or not the annotations can be evaluated at runtime on the given object, I would suggest switching over toFormat.FORWARDREF orFormat.STRING, so autospeccing continues to work in Python 3.14+ for people that used to rely onfrom __future__ import annotations and now want to switch to PEP 649 semantics, without needing to change their code.

CPython versions tested on:

3.14

Operating systems tested on:

Linux

Linked PRs

• gh-145754: Update signature retrieval in unittest.mock to use forwardref annotation format #145756