a = 1
b = 1
print(a is b) # True# True
a = "good"
b = "good"
print(a is b)
# False
a = "very good morning"
b = "very good morning"
print(a is b)
# False
a = []
b = []
print(a is b)本文首发于python黑洞网，博客园同步更新
原文：https://www.cnblogs.com/pythonzhilian/p/12625283.html