“其他"有什么用?在“for"之后在 Python 中循环? [英] What is the use of "else" after "for" loop in Python?

问题描述

似乎下面的两个代码都打印相同，那么python中for"循环之后的else"块有什么需要.

It seems both of the below codes are printing the same, then what is the need of "else" block after "for" loop in python.

代码 1:

for i in range(10):
    print i
else:
    print "after for loop"

代码 2:

for i in range(10):
    print i

print "after for loop"

提前致谢.

推荐答案

来自文档:

Loop 语句可能有一个 else 子句；它在循环因列表耗尽(使用 for)或条件变为假(使用 while)而终止时执行，但不会在循环被 break 语句终止时执行.

Loop statements may have an else clause; it is executed when the loop terminates through exhaustion of the list (with for) or when the condition becomes false (with while), but not when the loop is terminated by a break statement.

点击链接查看如何使用它的示例.

Follow the link for an example how this can be used.

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