[Bug 1603436] [NEW] Regression in python2.7 SRU breaks python-cassandra

[Max Bowsher]

Public bug reported:

"SRU: backport python 2.7.12 to 16.04 LTS" (bug 1591895) has caused a
regression in (at least) python-cassandra. Any attempt to connect to a
cluster fails due to:

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/cassandra/cluster.py", line 1894, in _reconnect_internal
    return self._try_connect(host)
  File "/usr/lib/python2.7/dist-packages/cassandra/cluster.py", line 1921, in _try_connect
    self_weakref = weakref.ref(self, callback=partial(_clear_watcher, weakref.proxy(connection)))
TypeError: ref() does not take keyword arguments

It would appear that Python 2.7.12 has made the permitted calling
conventions for weakref.ref() stricter.

See https://github.com/datastax/python-driver/pull/585 for upstream
discussion of the issue.

** Affects: python2.7 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: regression-update

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https://bugs.launchpad.net/bugs/1603436

Title:
  Regression in python2.7 SRU breaks python-cassandra

Status in python2.7 package in Ubuntu:
  New

Bug description:
  "SRU: backport python 2.7.12 to 16.04 LTS" (bug 1591895) has caused a
  regression in (at least) python-cassandra. Any attempt to connect to a
  cluster fails due to:

  Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/cassandra/cluster.py", line 1894, in _reconnect_internal
      return self._try_connect(host)
    File "/usr/lib/python2.7/dist-packages/cassandra/cluster.py", line 1921, in _try_connect
      self_weakref = weakref.ref(self, callback=partial(_clear_watcher, weakref.proxy(connection)))
  TypeError: ref() does not take keyword arguments

  It would appear that Python 2.7.12 has made the permitted calling
  conventions for weakref.ref() stricter.

  See https://github.com/datastax/python-driver/pull/585 for upstream
  discussion of the issue.

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