Method __eq__

Lib/test/test_descr.py:3233–3237

(self, other)

        self.assertEqual(1+0j, z)
        class ZZ(complex):
            def __eq__(self, other):
                try:
                    return abs(self - other) <= 1e-6
                except:
                    return NotImplemented
        zz = ZZ(1.0000003)
        self.assertEqual(zz, 1+0j)
        self.assertEqual(1+0j, zz)