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