简单介绍Python2.x版本中的cmp()方法的使用
cmp()方法比较两个列表的元素。
语法
以下是cmp()方法的语法：
cmp(list1, list2)
参数
- list1 -- 这是要进行比较的第一个列表
- list2 -- 这是要进行比较的第二个列表
返回值
如果元素是相同类型的，执行比较，并返回结果。如果元素是不同的类型，检查，看看他们是否是数字
- 如果是数字必要时强制进行数字比较
- 如果任一元素是数字，然后在另一元素是“大”(数字是“最小”)
- 否则，类型是按名称字母顺序排序
如果到达了列表中的一个的结束，较长的列表是“大”。如果耗尽列表和共享相同的数据，其结果是并列的，这意味着返回 0
例子
下面的例子显示了cmp()方法的使用。
#!/usr/bin/python list1, list2 = [123, 'xyz'], [456, 'abc'] print cmp(list1, list2); print cmp(list2, list1); list3 = list2 + [786]; print cmp(list2, list3)
当我们运行上面的程序，它会产生以下结果：
-1 1 -1
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