Opened 8 years ago

Last modified 7 years ago

#5683 defect new

— at zope.interface 4.0 causes DeprecationWarning for implements()Version 3

Reported by: Itamar Turner-Trauring Owned by:
Priority: normal Milestone: Python-3.x
Component: core Keywords:
Cc: Vladimir Perić, Thijs Triemstra Branch:

Description (last modified by Thijs Triemstra)

As mentioned in, newer versions of zope.interface give deprecation warning for implements(), which is used widely by Twisted. This was done in order to support Python 3; the newer version is a class decorator.

As part of Python 3 support we should probably switch to the new style. It was added in zope.interface 3.6, in 2010, so switching completely doesn't seem like an issue:

Using class decorators shouldn't be a problem post-12.1, since we'll have dropped Python 2.5 support by then (#5553).

We should ensure Twisted mentions it requires zope.interface 3.6 in the appropriate places (import time, dependency documentation).

Change History (3)

comment:1 Changed 8 years ago by Thijs Triemstra

Cc: Thijs Triemstra added

comment:2 Changed 8 years ago by Tristan Seligmann

This is still relevant for Python 3 support, but note that z.i 4.0.1 removed the DeprecationWarning again:

4.0.1 (2012-05-22)

Dropped explicit DeprecationWarnings for "class advice" APIS (these APIs are still deprecated under Python 2.x, and still raise an exception under Python 3.x, but no longer cause a warning to be emitted under Python 2.x).

comment:3 Changed 8 years ago by Thijs Triemstra

Description: modified (diff)
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