Message 127816 - Python tracker

Message127816

Author	georg.brandl
Recipients	belopolsky, benjamin.peterson, georg.brandl
Date	2011-02-03.20:14:53
SpamBayes Score	0.006518512
Marked as misclassified	No
Message-id	<1296764095.93.0.263935553917.issue11105@psf.upfronthosting.co.za>
In-reply-to

Content
Alex: If the node attributes were not mutable, it would be extremely awkward, not to say inefficient, to mutate an already existing AST as returned by ast.parse(). The AST objects in the _ast module aren't what Python works with internally, anyway. When calling ast.parse(), the AST is converted to Python objects (these are defined in Python-ast.c), and compile()ing such an object converts them back to the internal tree representation. This conversion is where recursions would need to be handled.

Content

Alex: If the node attributes were not mutable, it would be extremely awkward, not to say inefficient, to mutate an already existing AST as returned by ast.parse().

The AST objects in the _ast module aren't what Python works with internally, anyway. When calling ast.parse(), the AST is converted to Python objects (these are defined in Python-ast.c), and compile()ing such an object converts them back to the internal tree representation.  This conversion is where recursions would need to be handled.

History
Date	User	Action	Args
2011-02-03 20:14:55	georg.brandl	set	recipients: + georg.brandl, belopolsky, benjamin.peterson
2011-02-03 20:14:55	georg.brandl	set	messageid: <1296764095.93.0.263935553917.issue11105@psf.upfronthosting.co.za>
2011-02-03 20:14:53	georg.brandl	link	issue11105 messages
2011-02-03 20:14:53	georg.brandl	create