https://bugs.kde.org/show_bug.cgi?id=394155
James Beckett <jmb....@hackery.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |CONFIRMED
CC| |jmb....@hackery.net
--- Comment #1 from James Beckett <jmb....@hackery.net> ---
Also seen when installing for example graphite-carbon. Typical traceback:
> File "/usr/lib/python2.7/dist-packages/carbon/service.py", line 18, in
> <module>
> from twisted.application.internet import TCPServer, TCPClient, UDPServer
> File "/usr/lib/python2.7/dist-packages/twisted/application/internet.py",
> line 54, in <module>
> from automat import MethodicalMachine
> File "/usr/lib/python2.7/dist-packages/automat/__init__.py", line 2, in
> <module>
> from ._methodical import MethodicalMachine
> File "/usr/lib/python2.7/dist-packages/automat/_methodical.py", line 34, in
> <module>
> @attr.s(frozen=True)
> exceptions.TypeError: attributes() got an unexpected keyword argument 'frozen'
The root cause seems to be one step away from Twisted: python-twisted-code
17.9.0 depends python-automat>=0.6.0 depends python-attr, it's the latter which
is broken. Twisted 16.x from xenial doesn't depend on automat at all, hence it
escapes.
https://github.com/glyph/automat/issues/65 describes the issue:
> The patch for #62 in 3766391 that passes the frozen keyword to attr.s assumes
> attrs>=16.1.0 per python-attrs/attrs@cfa6d2e.
The initial patch for #62 made it into automat-0.6.0 (a year ago) but the fix
in https://github.com/glyph/automat/pull/66 didn't, and there's been no point
release since: https://github.com/glyph/automat/releases
My local workaround for now has been to downgrade Twisted to 16.0.0-1ubuntu0.2
(from xenial repo) and hold them.
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