Python技巧之“is”对比“==”

1# "is" vs "=="
2
3>>> a = [1, 2, 3]
4>>> b = a
5
6>>> a is b
7True
8>>> a == b
9True
10
11>>> c = list(a)
12
13>>> a == c
14True
15>>> a is c
16False
17
18# • "is" 表达式为真，如果变量指向同一个对象
19
20# • "==" 表达式为真，如果变量引用的对象相等