发布于 2015-06-21 10:38:07 | 121 次阅读 | 评论: 0 | 来源: 网络整理
下表列出了所有Python语言支持的成员运算符。
运算符 | 描述 | 示例 |
---|---|---|
in | 计算结果为true,如果它在指定变量找到,否则false。 | x在y中,在这里产生一个1,如果x是序列y的成员。 |
not in | 计算结果为true,如果它不找到在指定的变量顺序,否则为false。 | x不y中,这里不产生一个1,如果x是序列y的成员。 |
试试下面的例子就明白了所有的Python编程语言提供会员运算符:
#!/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"
当执行上面的程序它会产生以下结果:
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