a = 10 print(type(a)) a = "hello" print(type(a)) a = [1, 2, 3] print(type(a))
<class 'int'>、<class 'str'>、<class 'list'>
运行时报错，提示变量a的类型不可修改
<class 'int'>、<class 'int'>、<class 'int'>
<class 'object'>、<class 'object'>、<class 'object'>