[Zope-CMF] Re: Better DeprecationWarnings (was Re: SVN: CMF/trunk/CMFDefault/Portal.py - reverted Portal.py change of r39125 to fix BBB temporarily)

[Florent Guillaume]

Tres Seaver wrote:
> Note that I have just figured out that we can make DeprecationWarnings
> more useful by passing the 'stacklevel' argument to 'warnings.warn';
> passing a value of 2 for that argument causes the warning to be reported
> against the *caller* of the code issuing the warning, which makes it
> possible to find and remove the deprecated use.

Yes, I've changed a number of those in Zope and CMF already. It's very 
useful for deprecation.

Note that I prefer passing the stacklevel=2 (or 3) argument by name to be 
explicit.

Florent

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Florent Guillaume, Nuxeo (Paris, France)   CTO, Director of R&D
+33 1 40 33 71 59   http://nuxeo.com   fg at nuxeo.com