Python中的type与isinstance的区别详解

a = 123
b = "123"
c = (123,)
 
print(type(a))  # 输出<class 'int'>
print(type(b))  # 输出<class 'str'>
print(type(c))  # 输出<class 'tuple'>
print(type(None))   # 输出<class 'NoneType'>

import time
 
def test():
    print(time.time())
 
test()
print(type(test))  # 输出 <class 'function'>
print(type(object))  # 输出<class 'type'>
print(type(time))  # 输出<class 'module'>

# 定义一个函数作为类方法
def say_hi(self):
    print(f"大家好，我的公众号是: {self.name}，欢迎大家关注哟~")
 
MyClass = type('MyClass', (object,), {"name": "小博测试成长之路",
                                      "age": 18, "say": say_hi})

MyClass().say()

x = 5
y = "5"
print(isinstance(x, object))  # 输出 True
print(isinstance(x, int))  # 输出 True
多种类型的判断:
print(isinstance(y, (int, str)))  # 输出 True

继承关系的判断：
class A:
    pass
 
class B(A):
    pass
 
obj = B()
print(isinstance(obj, A))  # 输出 True