test_inspect fails with `--forever` argument

[Eclips4]

Traceback:

...many lines...
test_unwrap_several (test.test_inspect.TestUnwrap.test_unwrap_several) ... ok

======================================================================
ERROR: test_class_with_method_from_other_module (test.test_inspect.TestBuggyCases.test_class_with_method_from_other_module)       
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\KIRILL-1\CLionProjects\cpython\Lib\test\test_inspect.py", line 992, in test_class_with_method_from_other_module  
    self.assertIn("correct", inspect.getsource(inspect_actual.A))
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\KIRILL-1\CLionProjects\cpython\Lib\inspect.py", line 1317, in getsource
    lines, lnum = getsourcelines(object)
                  ^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\KIRILL-1\CLionProjects\cpython\Lib\inspect.py", line 1299, in getsourcelines
    lines, lnum = findsource(object)
                  ^^^^^^^^^^^^^^^^^^
  File "C:\Users\KIRILL-1\CLionProjects\cpython\Lib\inspect.py", line 1134, in findsource
    raise OSError('could not get source code')
OSError: could not get source code

----------------------------------------------------------------------
Ran 286 tests in 2.392s

FAILED (errors=1)
test test_inspect failed
test_inspect failed (1 error)

== Tests result: FAILURE ==

1 test OK.

1 test failed:
    test_inspect

Total duration: 7.2 sec
Tests result: FAILURE

Triend on current main.

Linked PRs

• gh-107446: Fix test_inspect.test_class_with_method_from_other_module under --forever #107451

[Eclips4]

bisected to #106968
cc @gaogaotiantian

[Eclips4]

Interesting. If we replace tempfile.TemporaryDirectory with something like that, error will gone.

    def test_class_with_method_from_other_module(self):
        tempdir = TESTFN + '_other_module_dir'
        os.mkdir(tempdir)
        with open(os.path.join(tempdir, 'inspect_actual%spy' % os.extsep),
                  'w', encoding='utf-8') as f:
            f.write(textwrap.dedent("""
                                import inspect_other
                                class A:
                                    def f(self):
                                        pass
                                class A:
                                    def f(self):
                                        pass  # correct one
                                A.f = inspect_other.A.f
                                """))
        with open(os.path.join(tempdir, 'inspect_other%spy' % os.extsep),
                'w', encoding='utf-8') as f:
            f.write(textwrap.dedent("""
                                class A:
                                    def f(self):
                                        pass
                                """))
        with DirsOnSysPath(tempdir):
            import inspect_actual
            self.assertIn("correct", inspect.getsource(inspect_actual.A))
        shutil.rmtree(tempdir)

[gaogaotiantian]

The inspect_actual module was loaded then the temp dir is removed under --forever, so the source file is no where to be found. I'll do a PR soon.

[gaogaotiantian]

I chose to simply do sys.modules.pop("inspect_actual"). We can try to fix the temp dir, but I do like the context of tempfile.TemporaryDirectory(), I think it's cleaner than TESTFN. However, I'm not opposed to use the same dir for the module.

[Eclips4]

Sure, solution with sys.modules.pop(...) more appropriate.