Hi Martijn > Betreff: Re: [Zope-dev] [Checkins] SVN: zope.app.http/trunk/ > - Replacedthedependency on zope.deprecation with BBB imports > > Hi there, > > Before we have this discussion yet again, I will record the > official stance in the zope toolkit decisions document, and > I'll quote it here: > > * When code moves to a new location to import it from (in the same or > another package), use a ``from foo import bar`` statement, with a > ``#BBB`` comment to indicate the import is only there to support > backwards compatibility. > > In the CHANGES.txt of a package, state that an import location got > deprecated and where the new location is (making this a feature > release, not a bugfix release). > > Reasons: > > * it avoid a dependency on zope.deprecation, which is > quite involved > in its implementation, using proxies. > > * A ``from .. import ..`` is immediately comprehensible to any > Python programmer as well as tools. > > * Deprecation warnings make it hard to write a library > that supports > multiple versions of another library; a change in an indirect > dependency can create deprecation warnings that the original > developer does not care about. > > * We are in the process of developing a testrunner extension that > will report on indirect imports, and a ZODB upgrade procedure. > > Feel free to discuss it, either to add arguments to refine > this, or to attempt to overthrow this decision entirely.
The only thing I could say about this concept is that we didn't start to remove #BBB marked imports. Just wait till we start remove the BBB imports and the packages from install_requires ... Regards Roger Ineichen > Regards, > > Martijn > > _______________________________________________ > Zope-Dev maillist - Zope-Dev@zope.org > http://mail.zope.org/mailman/listinfo/zope-dev > ** No cross posts or HTML encoding! ** (Related lists - > http://mail.zope.org/mailman/listinfo/zope-announce > http://mail.zope.org/mailman/listinfo/zope ) > _______________________________________________ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )