test_ok1/changelog/8503.bugfix.rst

:meth:`pytest.MonkeyPatch.syspath_prepend` no longer fails when
``setuptools`` is not installed.
It now only calls :func:`pkg_resources.fixup_namespace_packages` if
``pkg_resources`` was previously imported, because it is not needed otherwise.
monkeypatch.syspath_prepend: Skip fixup_namespace_packages if pkg_resources not imported Calling pkg_resources.fixup_namespace_packages() is only needed for packages that use pkg_resources.declare_namespace() and hence they already imported pkg_resources. When pkg_resources is not imported, we don't need to use it. This avoids an unneeded runtime dependency on setuptools. The code is tested by test_syspath_prepend_with_namespace_packages, behavior should remain unchanged, hence no new test was added. When people drop pkg_resources from sys.modules, they are on their own. If someone has a actual use case making this valid to support, they can come in and provide a test, a reference and a fix. 2021-04-01 23:21:45 +08:00			:meth:`pytest.MonkeyPatch.syspath_prepend` no longer fails when
			``setuptools`` is not installed.
			It now only calls :func:`pkg_resources.fixup_namespace_packages` if
			``pkg_resources`` was previously imported, because it is not needed otherwise.