Sourced from mock's changelog.

5.2.0

This is release is in memory of Michael Foord__, who originally authored the mock package and passed away in January 2025.

__ https://discuss.python.org/t/in-memoriam-michael-foord-1974-2025/78317

• gh-65454: :func:unittest.mock.Mock.attach_mock no longer triggers a call to a PropertyMock being attached.

• gh-117765: Improved documentation for :func:unittest.mock.patch.dict

• gh-124176: Add support for :func:dataclasses.dataclass in :func:unittest.mock.create_autospec. Now create_autospec will check for potential dataclasses and use :func:dataclasses.fields function to retrieve the spec information.

• gh-123934: Fix :class:unittest.mock.MagicMock reseting magic methods return values after .reset_mock(return_value=True) was called.

• gh-90848: Fixed :func:unittest.mock.create_autospec to configure parent mock with keyword arguments.

• gh-113569: Indicate if there were no actual calls in unittest :meth:~unittest.mock.Mock.assert_has_calls failure.

• gh-122858: Deprecate :func:!asyncio.iscoroutinefunction in favor of :func:inspect.iscoroutinefunction.

• gh-104745: Limit starting a patcher (from :func:unittest.mock.patch or :func:unittest.mock.patch.object) more than once without stopping it

• gh-75988: Fixed :func:unittest.mock.create_autospec to pass the call through to the wrapped object to return the real result.

• gh-119600: Fix :func:unittest.mock.patch to not read attributes of the target when new_callable is set. Patch by Robert Collins.

• gh-113407: Fix import of :mod:unittest.mock when CPython is built without docstrings.

• gh-120732: Fix name passing to :class:unittest.mock.Mock object when using :func:unittest.mock.create_autospec.

5.1.0

• bpo-44185: :func:unittest.mock.mock_open will call the :func:close method of the file handle mock when it is exiting from the context

... (truncated)

• 0f5df82 In memoriam: Michael Foord 1974-2025
• 3c737e2 Preparing for 5.2.0 release.
• 563f311 latest sync point
• 4fc238e unittest.mock test and coverage fixup (#130787)
• aee44ed Backport-specific code coverage fixes
• 9081bbe Fix bug in backporting docs
• fdacaa2 Add set_event_loop_policy to backports
• 4221c21 Revert "gh-71339: Add additional assertion methods for unittest (GH-128707)"
• 45d2d49 gh-71339: Add additional assertion methods for unittest (GH-128707)
• 9e3f49c gh-127949: deprecate asyncio.set_event_loop_policy (#128024)
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