demandimport error - Error on push/pull

Created originally on Bitbucket by iofik (Vladimir Iofik)

#!bash

$ hg pull --traceback 
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 87, in _runcatch
    return _dispatch(req)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 684, in _dispatch
    cmdpats, cmdoptions)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 466, in runcommand
    ret = _runcommand(ui, options, cmd, d)
  File "/usr/lib/python2.7/dist-packages/mercurial/extensions.py", line 184, in wrap
    return wrapper(origfn, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/hgext/pager.py", line 107, in pagecmd
    return orig(ui, options, cmd, cmdfunc)
  File "/usr/lib/python2.7/dist-packages/mercurial/extensions.py", line 184, in wrap
    return wrapper(origfn, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/hgext/color.py", line 373, in colorcmd
    return orig(ui_, opts, cmd, cmdfunc)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 738, in _runcommand
    return checkargs()
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 692, in checkargs
    return cmdfunc()
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 681, in <lambda>
    d = lambda: util.checksignature(func)(ui, *args, **cmdoptions)
  File "/usr/lib/python2.7/dist-packages/mercurial/util.py", line 458, in check
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/mercurial/extensions.py", line 139, in wrap
    util.checksignature(origfn), *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/mercurial/util.py", line 458, in check
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/hgext/mq.py", line 3229, in mqcommand
    return orig(ui, repo, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/mercurial/util.py", line 458, in check
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/mercurial/extensions.py", line 139, in wrap
    util.checksignature(origfn), *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/mercurial/util.py", line 458, in check
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/hgext/rebase.py", line 629, in pullrebase
    orig(ui, repo, *args, **opts)
  File "/usr/lib/python2.7/dist-packages/mercurial/util.py", line 458, in check
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/mercurial/commands.py", line 4226, in pull
    other = hg.peer(repo, opts, source)
  File "/usr/lib/python2.7/dist-packages/mercurial/hg.py", line 104, in peer
    return repository(rui, path, create)
  File "/usr/lib/python2.7/dist-packages/mercurial/hg.py", line 93, in repository
    repo = _peerlookup(path).instance(ui, path, create)
  File "/usr/lib/python2.7/dist-packages/mercurial/httprepo.py", line 236, in instance
    inst._fetchcaps()
  File "/usr/lib/python2.7/dist-packages/mercurial/httprepo.py", line 57, in _fetchcaps
    self.caps = set(self._call('capabilities').split())
  File "/usr/lib/python2.7/dist-packages/mercurial/httprepo.py", line 169, in _call
    fp = self._callstream(cmd, **args)
  File "/usr/lib/python2.7/dist-packages/mercurial/httprepo.py", line 117, in _callstream
    resp = self.urlopener.open(req)
  File "/usr/lib/python2.7/urllib2.py", line 406, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 519, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 438, in error
    result = self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 890, in http_error_401
    url, req, headers)
  File "/usr/lib/python2.7/dist-packages/mercurial/url.py", line 429, in http_error_auth_reqed
    self, auth_header, host, req, headers)
  File "/usr/local/lib/python2.7/dist-packages/mercurial_keyring.py", line 386, in basic_http_error_auth_reqed
    return basic_http_error_auth_reqed.orig(self, authreq, host, req, headers)
  File "/usr/lib/python2.7/urllib2.py", line 865, in http_error_auth_reqed
    response = self.retry_http_basic_auth(host, req, realm)
  File "/usr/lib/python2.7/urllib2.py", line 871, in retry_http_basic_auth
    user, pw = self.passwd.find_user_password(realm, host)
  File "/usr/local/lib/python2.7/dist-packages/mercurial_keyring.py", line 380, in find_user_password
    return self._pwd_handler.find_auth(self, realm, authuri, req)
  File "/usr/local/lib/python2.7/dist-packages/mercurial_keyring.py", line 231, in find_auth
    pwd = password_store.get_http_password(keyring_url, user)
  File "/usr/local/lib/python2.7/dist-packages/mercurial_keyring.py", line 114, in get_http_password
    self._format_http_key(url, username))
  File "/usr/local/lib/python2.7/dist-packages/keyring/core.py", line 36, in get_password
    return _keyring_backend.get_password(service_name, username)
  File "/usr/local/lib/python2.7/dist-packages/keyring/backends/Windows.py", line 96, in get_password
    res = self._get_password(service)
  File "/usr/local/lib/python2.7/dist-packages/keyring/backends/Windows.py", line 111, in _get_password
    except pywintypes.error:
  File "/usr/lib/python2.7/dist-packages/mercurial/demandimport.py", line 86, in __getattribute__
    self._load()
  File "/usr/lib/python2.7/dist-packages/mercurial/demandimport.py", line 58, in _load
    mod = _origimport(head, globals, locals)
ImportError: No module named pywintypes
abort: No module named pywintypes!