code: def _appendArgs(url, args):
      
      # to be merged with oidutil.appendArgs when we combine the projects.
      if hasattr(args, 'items'):
          args = list(args.items())
          args.sort()
  
      if len(args) == 0:
          return url
  
      # According to XRI Resolution section "QXRI query parameters":
      #
      # """If the original QXRI had a null query component (only a leading
      #    question mark), or a query component consisting of only question
      #    marks, one additional leading question mark MUST be added when
      #    adding any XRI resolution parameters."""
  
      if '?' in url.rstrip('?'):
          sep = '&'
      else:
          sep = '?'
  
      return '%s%s%s' % (url, sep, urlencode(args))
docs: Append some arguments to an HTTP query.