Fails to generate oauth token correctly when run in python3

[Robert Bruce Park]

This traceback arises when there is a problem with an oauth token in python3:

Traceback (most recent call last):
  File "/var/lib/citrain/citrain/status.py", line 53, in <module>
    run_script(__name__, __doc__, lambda: stock_main(update_status))
  File "/var/lib/citrain/cupstream2distro/utils.py", line 198, in run_script
    sys.exit(main())
  File "/var/lib/citrain/citrain/status.py", line 53, in <lambda>
    run_script(__name__, __doc__, lambda: stock_main(update_status))
  File "/var/lib/citrain/cupstream2distro/silomanager.py", line 139, in stock_main
    body(silo_state)
  File "/var/lib/citrain/citrain/status.py", line 46, in update_status
    logging.info(silo_state.summarize(status=False))
  File "/var/lib/citrain/cupstream2distro/silomanager.py", line 318, in summarize
    dest=self.dest.web_link,
  File "/var/lib/citrain/cupstream2distro/utils.py", line 117, in memoizer
    cache[key] = obj(*args, **kwargs)
  File "/var/lib/citrain/cupstream2distro/silomanager.py", line 465, in dest
    series = self._series
  File "/var/lib/citrain/cupstream2distro/silomanager.py", line 185, in __getattr__
    self.load_bileto()
  File "/var/lib/citrain/cupstream2distro/silomanager.py", line 284, in load_bileto
    creator = lp.people[creator]
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/resource.py", line 1001, in __getitem__
    shim_resource._ensure_representation()
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/resource.py", line 382, in _ensure_representation
    representation = self._root._browser.get(self._wadl_resource)
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 436, in get
    response, content = self._request(url, extra_headers=headers)
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 387, in _request
    str(url), method=method, body=data, headers=headers)
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 357, in _request_and_retry
    url, method=method, body=body, headers=headers)
  File "/usr/lib/python3/dist-packages/httplib2/__init__.py", line 1241, in request
    (response, new_content) = self._request(conn, authority, uri, request_uri, method, body, headers, redirections, cachekey)
  File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 132, in _request
    return self.retry_on_bad_token(response, content, *args)
  File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 139, in retry_on_bad_token
    if (self._bad_oauth_token(response, content)
  File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 125, in _bad_oauth_token
    (content.startswith("Expired token")
TypeError: startswith first arg must be bytes or a tuple of bytes, not str

Would be nice if this worked in python3 as otherwise I'm using the rest of the API without issue.