PEP 315: Enhanced While Loop

[Neil Hodgson]

Andrew Koenig:

> By implication, there is no obvious reason that one could not write
> 
>         while <condition1>:
>             <code1>
>         and while <condition2>:
>             <code2>
>         and while <condition3>:
>             <code3>
> ...
> 
> Looking at these examples, I find myself liking the "and while" idea more,
> because it uses (negative) indentation to mark the possible exit points.

    Allowing break expressions to dedent would help clarify the current 
idiom:

while <condition1>:
         <code1>
break if <condition2>:
         <code2>

    Or to make the colon scan better:

while <condition1>:
         <code1>
break if <condition2> else:
         <code2>

     Neil