new()方法会在init之前调用

>>> class CapStr(str):    def __new__(cls,string):        string = string.upper()        return str.__new__(cls,string)    pass>>> a = CapStr('i love you')>>> a'I LOVE YOU'>>>

del(self)

垃圾回收机制调用del方法:

class C:    def __init__(self):        print("__init__方法被调用")        pass    def __del__(self):        print("__del__方法被调用")        pass    passC()

输出结果:

__init__方法被调用__del__方法被调用>>>