Message 261001 - Python tracker

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Author	ezio.melotti
Recipients	docs@python, ezio.melotti, tocretpa
Date	2016-02-29.10:30:45
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1456741845.53.0.996396907156.issue26458@psf.upfronthosting.co.za>
In-reply-to

Content
This is not a bug, see https://docs.python.org/3.6/faq/programming.html#why-are-default-values-shared-between-objects In the first case L is evaluated once at compile time. In the second case L is always set to a new empty list, regardless of what you pass as second argument to f. In the third case L is set to a new empty list only if you don't pass a second argument (or if you pass None).

This is not a bug, see https://docs.python.org/3.6/faq/programming.html#why-are-default-values-shared-between-objects

In the first case L is evaluated once at compile time.
In the second case L is always set to a new empty list, regardless of what you pass as second argument to f.
In the third case L is set to a new empty list only if you don't pass a second argument (or if you pass None).

History
Date	User	Action	Args
2016-02-29 10:30:45	ezio.melotti	set	recipients: + ezio.melotti, docs@python, tocretpa
2016-02-29 10:30:45	ezio.melotti	set	messageid: <1456741845.53.0.996396907156.issue26458@psf.upfronthosting.co.za>
2016-02-29 10:30:45	ezio.melotti	link	issue26458 messages
2016-02-29 10:30:45	ezio.melotti	create