[Python-Dev] PEP 548: More Flexible Loop Control

R. David Murray rdmurray at bitdance.com
Tue Sep 5 20:11:00 EDT 2017

I've written a PEP proposing a small enhancement to the Python loop
control statements.  Short version: here's what feels to me like a
Pythonic way to spell "repeat until":

        <do stuff>
        break if <done condition>

The PEP goes into some detail on why this feels like a readability
improvement in the more general case, with examples taken from
the standard library:


Unlike Larry, I don't have a prototype, and in fact if this idea
meets with approval I'll be looking for a volunteer to do the actual


PS: this came to me in a dream on Sunday night, and the more I explored
the idea the better I liked it.  I have no idea what I was dreaming about
that resulted in this being the thing left in my mind when I woke up :)

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