[Python-ideas] Is this PEP-able? for X in ListY while conditionZ:

[jimjhb at aol.com]

That's a break....



-----Original Message-----
From: Shane Green <shane at umbrellacode.com>
To: Ned Batchelder <ned at nedbatchelder.com>
Cc: python-ideas <python-ideas at python.org>
Sent: Tue, Jun 25, 2013 1:13 pm
Subject: Re: [Python-ideas] Is this PEP-able? for X in ListY while conditionZ:


[x for x in l if x < 10 else break]?








On Jun 25, 2013, at 10:08 AM, Ned Batchelder <ned at nedbatchelder.com> wrote:


You don't have to: use the break statement, that's what it's for.   About people teaching students not to use it: the existence of bad teachers teaching silly ideas is not a reason to add syntax to Python.

--Ned.


On 6/25/2013 10:46 AM, jimjhb at aol.com wrote:



You shouldn't have to invoke takewhile and a lambda just to break out of for loop.


>http://docs.python.org/2/library/itertools.html#itertools.takewhile
>
>for item in takewhile(lambda x: x < 5, range(10)):
>    pass

>>
>> [People who avoid the 'break' by functionalizing an inner portion of the
>> loop are just kidding themselves and making their own code worse, IMO.
>> Takewhile from itertools also works, but that's clumsy and wordy as well.]
>>








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