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python中类的定义

（属性不可修改用_修饰）

class Player():    def __init__(self, name, hp, occr):        self.name = name        self.hp = hp        self.__occr = occr    def print_Method(self):        print("name is", self.name, "    hp is", self.hp,"    occr is", self.__occr)user2 = Player('tom', 100)user3 = Player('jerry', 80)user2.print_Method()user3.print_Method()

类的使用：with的使用

with open('name.txt') as f:    print(f.read())

自定义with的方法

class TestWith():    def __enter__(self):        print("start")    def __exit__(self, exc_type, exc_val, exc_tb):        if exc_tb is None:            print("stop")        else:            print('has error',exc_tb)    # 使用with TestWith():    print('to do something')    raise NameError('testNameError')

输出

start

to do something

has error <traceback object at 0x1045b8988>

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