python - 在 Python 中跳出 while 循环后的流程控制

Question

我对编程和 Python 都很陌生。现在有几次，我创建了一个感觉很尴尬的程序流程，我想知道我是否遵循了最佳实践。这在概念上是我想做的:

def pseudocode():
    while some condition is true:
        do some stuff
        if a condition is met:
            break out of the while loop
    now do a thing once, but only if you never broke out of the loop above 

我最终所做的工作有效，但不知何故感觉不对:

def pseudocode():
    while some condition is true:
        do some stuff
        if some condition is met:
            some_condition_met = True
            break out of the while loop

    if some_condition_met is False:
        do a thing

有没有更好的办法？

Answer 1

您正在寻找 while-else循环:

def pseudocode():
    while some condition is true:
        do some stuff
        if a condition is met:
            break out of the while loop
    else:
        now do a thing once, but only if you never broke out of the loop above 

来自文档:

while_stmt ::=  "while" expression ":" suite
                ["else" ":" suite]

A break statement executed in the first suite terminates the loop without executing the else clause’s suite.