Python mimetypes 模块，knownfiles() 实例源码

def test_is_accessible_mimetypes_files(self):
    stubs.FakeFile.set_allowed_paths(self.tempdir, [])
    for filename in mimetypes.knownfiles:
      if os.path.isfile(filename):
        self.assertTrue(stubs.FakeFile.is_file_accessible(filename))