Message 70404 - Python tracker

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Author	pitrou
Recipients	amaury.forgeotdarc, benjamin.peterson, pitrou
Date	2008-07-29.15:59:32
SpamBayes Score	0.031680502
Marked as misclassified	No
Message-id	<1217347174.01.0.827401557066.issue3462@psf.upfronthosting.co.za>
In-reply-to

Content
Ok, I've found it: « But why is __builtins__ a module in __main__ and a dict elsewhere? Because in interactive mode, printing vars() would include __builtins__, which would be rather large. Code that incorrectly assumes it's always one or the other is incorrect and has always been incorrect; the wart was present when this feature first appeared. Since this has never been documented AFAIK, it's probably just been (incorrectly) reverse-engineered and copied around. » http://mail.python.org/pipermail/python-3000/2007-March/006170.html :-S

Ok, I've found it:

« But why is __builtins__ a module in __main__ and a dict elsewhere?
Because in *interactive* mode, printing vars() would include
__builtins__, which would be rather large. Code that incorrectly
assumes it's always one or the other is incorrect and has always been
incorrect; the wart was present when this feature first appeared.
Since this has never been documented AFAIK, it's probably just been
(incorrectly) reverse-engineered and copied around. »

http://mail.python.org/pipermail/python-3000/2007-March/006170.html

:-S

History
Date	User	Action	Args
2008-07-29 15:59:34	pitrou	set	recipients: + pitrou, amaury.forgeotdarc, benjamin.peterson
2008-07-29 15:59:34	pitrou	set	messageid: <1217347174.01.0.827401557066.issue3462@psf.upfronthosting.co.za>
2008-07-29 15:59:33	pitrou	link	issue3462 messages
2008-07-29 15:59:32	pitrou	create