Code review comment for lp:~vila/bzr/1249732-acceptable-keys-from-config

I tried running hydrazine after approving this merge proposal and it
takes an IOError exception because the filename is too long (shown
below). I wonder if that would be remedied by upgrading from Python
2.6 to 2.7 or beyond?

$ ./feed-pqm bzr
Looking for ['Approved'] mps in https://api.launchpad.net/1.0/bzr
https://code.launchpad.net/~vila/bzr/1249732-acceptable-keys-from-config/+merge/194640
       message: Fix command line override handling for acceptable_keys
        source: lp:~vila/bzr/1249732-acceptable-keys-from-config
        target: lp:bzr
        status: Approved
       created: 2013-11-10 15:34:32.127695+00:00
      reviewed: 2014-04-16 04:34:09.513847+00:00
    registrant: vila
Traceback (most recent call last):
  File "./feed-pqm", line 261, in <module>
    sys.exit(main(sys.argv))
  File "./feed-pqm", line 219, in main
    show_mp(mp)
  File "./feed-pqm", line 104, in show_mp
    (vote.comment and vote.comment.vote or 'Requested'),
  File "/usr/lib/pymodules/python2.6/lazr/restfulclient/resource.py",
line 638, in __getattr__
    return super(Entry, self).__getattr__(name)
  File "/usr/lib/pymodules/python2.6/lazr/restfulclient/resource.py",
line 301, in __getattr__
    return self.lp_get_parameter(attr)
  File "/usr/lib/pymodules/python2.6/lazr/restfulclient/resource.py",
line 196, in lp_get_parameter
    self._ensure_representation()
  File "/usr/lib/pymodules/python2.6/lazr/restfulclient/resource.py",
line 331, in _ensure_representation
    representation = self._root._browser.get(self._wadl_resource)
  File "/usr/lib/pymodules/python2.6/lazr/restfulclient/_browser.py",
line 316, in get
    response, content = self._request(url, extra_headers=headers)
  File "/usr/lib/pymodules/python2.6/lazr/restfulclient/_browser.py",
line 260, in _request
    str(url), method=method, body=data, headers=headers)
  File "/usr/lib/pymodules/python2.6/httplib2/__init__.py", line 1444,
in request
    (response, content) = self._request(conn, authority, uri,
request_uri, method, body, headers, redirections, cachekey)
  File "/usr/lib/pymodules/python2.6/lazr/restfulclient/_browser.py",
line 154, in _request
    redirections, cachekey)
  File "/usr/lib/pymodules/python2.6/httplib2/__init__.py", line 1252,
in _request
    _updateCache(headers, response, content, self.cache, cachekey)
  File "/usr/lib/pymodules/python2.6/httplib2/__init__.py", line 431,
in _updateCache
    cache.set(cachekey, text)
  File "/usr/lib/pymodules/python2.6/httplib2/__init__.py", line 701, in set
    f = file(cacheFullPath, "wb")
IOError: [Errno 36] File name too long:
'/home/rwilbur/.launchpadlib/api.launchpad.net/cache/api.launchpad.net,1.0,~vila,bzr,1249732-acceptable-keys-from-config,+merge,194640,comments,512879-application,json,0454099ae69ddb0c0d041245b581070d'