while 1 vs while True
Nick Coghlan
ncoghlan at iinet.net.au
Wed Dec 15 04:41:53 EST 2004
Paul Rubin wrote:
> Nick Coghlan <ncoghlan at iinet.net.au> writes:
>
>>Until this code:
>>
>>.>>> import pdb
>>.>>> pdb.True = 0
>>.>>> pdb.x = "Darn writeable module dictionaries"
>>.>>> from pdb import True
>>.>>> True
>>0
>>.>>> from pdb import x
>>.>>> x
>>'Darn writeable module dictionaries'
>
>
> If Python really does behave that way, that bug should be fixed immediately.
I tried it out in the 2.4 interpreter before posting it - it certainly does
behave that way.
And some test frameworks do make use of the capability to inject behaviour into
the module under test (e.g. the one mentioned here:
http://mail.python.org/pipermail/python-list/2003-April/156301.html).
This is behaviour which has been around for a while - and breaking such expected
behaviour gratuitously isn't acceptable.
PEP 267 discusses a way of speeding access to globals/builtins without giving up
the external binding of names.
Cheers,
Nick.
--
Nick Coghlan | ncoghlan at email.com | Brisbane, Australia
---------------------------------------------------------------
http://boredomandlaziness.skystorm.net
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