Python 008 面向对象高级编程

Issues

 1. 使用 @proterty 描述的方法在调用时切忌不能带括号()

  1.1 TypeError: ‘int’ object is not callable

class ArrayStack(object):
    
    def __init__(self, size: int):
        self.__array_stack = []
        self.__size = size
        self.__top = 0


    @property
    def size(self):
        return self.__size


if __name__ == "__main__":
    my_array_stack = ArrayStack(5)
    num = my_array_stack.size()
    print("size of stack: %d" % num))

• Root Cause:

    Error Code:
        num = my_array_stack.size()
        print("size of stack: %d" % num))
    
    Error:
            num = my_array_stack.size()
        TypeError: 'int' object is not callable
    
    Root cause:
        Method size() of Class ArrayStack has been described with @property,
    so you should use it like "my_object.size" not "my_object.size()".

• Resolution:

- num = my_array_stack.size()
+ num = my_array_stack.size