code: def edit(self, title=None, body=None, assignee=None, state=None,
               milestone=None, labels=None):
          
          json = None
          data = {'title': title, 'body': body, 'assignee': assignee,
                  'state': state, 'milestone': milestone, 'labels': labels}
          self._remove_none(data)
          if data:
              if 'milestone' in data and data['milestone'] == 0:
                  data['milestone'] = None
              json = self._json(self._patch(self._api, data=dumps(data)), 200)
          if json:
              self._update_(json)
              return True
          return False
docs: Edit this issue.
  
          :param str title: Title of the issue
          :param str body: markdown formatted body (description) of the issue
          :param str assignee: login name of user the issue should be assigned
              to
          :param str state: accepted values: ('open', 'closed')
          :param int milestone: the NUMBER (not title) of the milestone to
              assign this to [1]_, or 0 to remove the milestone
          :param list labels: list of labels to apply this to
          :returns: bool
  
          .. [1] Milestone numbering starts at 1, i.e. the first milestone you
                 create is 1, the second is 2, etc.