while 1 vs while True
Steve Holden
steve at holdenweb.com
Tue Dec 14 11:15:02 EST 2004
Fredrik Lundh wrote:
> Steve Holden wrote:
>
>
>>It was unfortunate that so many people chose to use that for compatibility, when if they'd used
>>the same code that the win32all extensions did they could have retained backward compatibility
>>even across a change to constants:
>>
>>try:
>> True
>>except AttributeError:
>> True, False = (1==1), (1!=1)
>
>
> that doesn't work, though:
>
> $ python2.1 test.py
> Traceback (most recent call last):
> File "test.py", line 2, in ?
> True
> NameError: name 'True' is not defined
>
Well, OK. But, lest people should think the worse of win32all because of
my laziness in not finding the exact quote, I should point out that the
code I meant to quote actually says:
# Pre 2.2.1 compat.
try: True, False
except NameError: True = 1==1; False = 1==0
I believe this should work for all versions up to 2.4, and would also
work with a 2.5 that made True and False constants. But if anyone can
prove me wrong it would be you ... :-)
regards
Steve
--
Steve Holden http://www.holdenweb.com/
Python Web Programming http://pydish.holdenweb.com/
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