# -*- coding: utf-8 -*-

# 身份运算符 is, is not
a = 1
b = 2
a is b

a = 1
b = 1
a is b
a == b

a = 1
b = 1.0
a == b # True
a is b # False
# 值是否相等 is 不是比较值相等。is 比较的是两个变量的身份是否相等(内存地址)
id(a)
id(b)

a = {1,2,3}
b = {2,1,3}
a == b
a is b

c = (1,2,3)
d = (2,1,3)
c == d
c is d