Python会员运算符
Python的成员资格运算符测试序列中的成员资格,例如字符串,列表或元组。有两个成员运算符,如下-
评估为TRUE,如果它发现了指定的顺序,否则为假在变量中。
如果找不到指定序列中的变量,则评估为true,否则为false。
示例
#!/usr/bin/python a = 10 b = 20 list = [1, 2, 3, 4, 5 ]; if ( a in list ): print "Line 1 - a is available in the given list" else: print "Line 1 - a is not available in the given list" if ( b not in list ): print "Line 2 - b is not available in the given list" else: print "Line 2 - b is available in the given list" a = 2 if ( a in list ): print "Line 3 - a is available in the given list" else: print "Line 3 - a is not available in the given list"
输出结果
当您执行上述程序时,它将产生以下结果-
Line 1 - a is not available in the given list Line 2 - b is not available in the given list Line 3 - a is available in the given list
热门推荐
1 泰迪狗狗如何训练
3 狗狗训练图
5 狗狗训练方法
6 训练狗狗不咬人
8 敏捷训练狗狗
10 训练狗狗吃饭
11 泰迪狗狗训练
12 狗狗从多大开始训练
13 狗狗训练学校费用
14 怎么去训练狗狗
15 狗狗训练狗狗
16 狗狗训练教程
17 训练狗狗装死
18 泰迪狗狗的训练方法