[Python-Dev] source-level backward compatibility requirements (original) (raw)

Guido van Rossum guido at python.org
Fri Dec 5 11:15:57 EST 2003

I still think the use of apply() in the logging module needs to be fixed. Here's how I think it should be done, retaining source compatibility for Python back to 1.5.2:

Add a new module, logging.apply, that defines apply() in terms of the *args, **kw syntax. The modules that use apply, "logging" and "logging.config", would each contain these two lines near the top: if sys.versioninfo >= (2, 3): from logging.apply import apply That would allow a compatible version of apply() to be used for newer Pythons without triggering the deprecation warning. It would also minimize the changes to the package.

Unfortunately, this would make apply even slower than the system version with the silent deprecation warning. :-(

I'd rather drop 1.5.2 compatibility for the logging module as it is in CVS. 1.5.2 users can continue to use the last version that was distributed by its author independently.

--Guido van Rossum (home page: http://www.python.org/~guido/)

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