Method clear

Lib/test/test_functools.py:1966–1969

()

                self.assertEqual(f(k, 0), orig(k, 0))

        def clear():
            start.wait(10)
            for _ in range(2*m):
                f.cache_clear()

        orig_si = sys.getswitchinterval()
        support.setswitchinterval(1e-6)