test_import.py 文件源码

def setUp(self):
        self.source = TESTFN + '.py'
        self._clean()
        with open(self.source, 'w') as fp:
            print('# This is a test file written by test_import.py', file=fp)
        sys.path.insert(0, os.curdir)
        importlib.invalidate_caches()