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[Python-Dev] Exception Reorg PEP checked in
Nick Coghlanncoghlan at gmail.com
Thu Aug 4 12:07:40 CEST 2005
Brett Cannon wrote:> OK, once the cron job comes around and is run,>http://www.python.org/peps/pep-0348.html will not be a 404 but be the> latest version of the PEP.>> Differences since my last public version is that it has> BaseException/Exception as the naming hierarchy, Warning inherits from> Exception, UserException is UserError, and StandardError inherits from> Exception. I also added better annotations on the tree for noticing> where inheritance changed and whether it become broader (and thus had> a new exception in its MRO) or more restrictive (and thus lost an> exception). Basically everything that Guido has brought up today> (08-03).>If/when you add a "Getting there from here" section, it would be worth noting that there are a few basic strategies to be applied: - for new exceptions: - just add them in release 2.x - for name changes: - add the new name as an alias in release 2.x - deprecate the old name in release 2.x - delete the old name in release 2.(x+1) - to switch inheritance to a new exception type: - add the inheritance to the new parent in release 2.x - delete the inheritance from the old parent in release 3.0 - to switch inheritance to an existing exception type: - add the inheritance to the new parent in release 3.0 - delete the inheritance from the old parent in release 3.0Cheers,Nick.-- Nick Coghlan |ncoghlan at gmail.com | Brisbane, Australia---------------------------------------------------------------http://boredomandlaziness.blogspot.com
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