test_standard_library.py 文件源码

def test_itertools_filterfalse(self):
        """
        Tests whether itertools.filterfalse is available.
        """
        from itertools import filterfalse
        not_div_by_3 = filterfalse(lambda x: x % 3 == 0, range(8))
        self.assertEqual(list(not_div_by_3), [1, 2, 4, 5, 7])