test_import.py 文件源码

def test_missing_source(self):
        # With PEP 3147 cache layout, removing the source but leaving the pyc
        # file does not satisfy the import.
        __import__(TESTFN)
        pyc_file = importlib.util.cache_from_source(self.source)
        self.assertTrue(os.path.exists(pyc_file))
        os.remove(self.source)
        forget(TESTFN)
        importlib.invalidate_caches()
        self.assertRaises(ImportError, __import__, TESTFN)