python | 运算符 | 比较运算符

 1 # encoding: utf-8
 2 
 3 a = 89
 4 b = 89
 5 # 输出唯一标识
 6 print(id(a),id(b))
 7 # 对比唯一标识
 8 print(a is b)
 9 a = 89
10 b = 98
11 print(id(a),id(b))
12 print(a is b)
13 a = b
14 print(id(a),id(b))
15 print(a is b)
16 
17 a = [1]
18 b = [1]
19 print(id(a),id(b))
20 print(a is b)
21 a = b
22 print(id(a),id(b))
23 print(a is b)
24 
25 # 链状比较运算符
26 print(1 < 2 < 3)
27 print(2 < 1 < 3)