Message 70195 - Python tracker

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In-reply-to
Author	bhy
Recipients	alexandre.vassalotti, amaury.forgeotdarc, benjamin.peterson, bhy
Date	2008年07月24日.06:46:01
SpamBayes Score	0.0010235329
Marked as misclassified	No
Message-id	<1216881965.34.0.361210909464.issue3208@psf.upfronthosting.co.za>

Content
I found the explanation of why buitl-ins are immutable: For the curious: there are two reasons why changing built-in classes is disallowed. First, it would be too easy to break an invariant of a built-in type that is relied upon elsewhere, either by the standard library, or by the run-time code. Second, when Python is embedded in another application that creates multiple Python interpreters, the built-in class objects (being statically allocated data structures) are shared between all interpreters; thus, code running in one interpreter might wreak havoc on another interpreter, which is a no-no. (From http://www.python.org/download/releases/2.2.3/descrintro/) Is the statement still valid for current version of Python?

Content

I found the explanation of why buitl-ins are immutable:
For the curious: there are two reasons why changing built-in classes is 
disallowed. First, it would be too easy to break an invariant of a 
built-in type that is relied upon elsewhere, either by the standard 
library, or by the run-time code. Second, when Python is embedded in 
another application that creates multiple Python interpreters, the 
built-in class objects (being statically allocated data structures) are 
shared between all interpreters; thus, code running in one interpreter 
might wreak havoc on another interpreter, which is a no-no.
(From http://www.python.org/download/releases/2.2.3/descrintro/)
Is the statement still valid for current version of Python?

History
Date	User	Action	Args
2008年07月24日 06:46:05	bhy	set	spambayes_score: 0.00102353 -> 0.0010235329 recipients: + bhy, amaury.forgeotdarc, alexandre.vassalotti, benjamin.peterson
2008年07月24日 06:46:05	bhy	set	spambayes_score: 0.00102353 -> 0.00102353 messageid: <1216881965.34.0.361210909464.issue3208@psf.upfronthosting.co.za>
2008年07月24日 06:46:04	bhy	link	issue3208 messages
2008年07月24日 06:46:02	bhy	create

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