Method __new__

Lib/test/test_descr.py:1926–1929

(cls)

        # Testing __new__ slot override...
        class C(list):
            def __new__(cls):
                self = list.__new__(cls)
                self.foo = 1
                return self
            def __init__(self):
                self.foo = self.foo + 2
        a = C()