code: def get_issue(self, branch):
          
          if branch:
              try:
                  issue = self.issue(branch, expand='changelog')
                  return issue
              except jira.exceptions.JIRAError as ex:
                  if ex.status_code == 404:
                      print "No JIRA issue found for branch %s" % branch
                  else:
                      print str(ex)
docs: Gets the JIRA issue associated with the branch name.
  
          Returns None if no issue with this branch name.