Python: 练习 __str__ __repr__ __call__ __del__

class ClassA(object):
    def __init__(self):
        print("init")

    def __str__(self):
        return "str ClassA Object"

    def __repr__(self):
        return "repr ClassA Object"

    def __call__(self, *args, **kwargs):
        print(args, kwargs)

    def __del__(self):
        print(f"del {self}")


obj = ClassA()
print(obj)
print("%s" % obj)
print("%r" % obj)
obj(1, 2, a1="a", b1="b1")

运行结果：
init
str ClassA Object
str ClassA Object
repr ClassA Object
(1, 2) {'a1': 'a', 'b1': 'b1'}
del str ClassA Object