【6.2】==和is的区别

#!/user/bin/env python
# -*- coding:utf-8 -*-

a = [1, 2, 3, 4]
b = [1, 2, 3, 4]
print(id(a), id(b))
print(a is b)

# 对于1或者‘abc’，python会创建一个全局唯一的一个对象
c = 1
d = 1
e = 'abc'
f = 'abc'
print(id(c), id(d))
print(id(e), id(f))
print(c is d)
print(e is f)


class People:
    pass


person = People()
if type(person) is People:
    print('yes')

2341737489032 2341737489096
False
140734558986896 140734558986896
2341737916208 2341737916208
True
True
yes

　　==比较的是值，is比较的是内存地址