code: def old_signing_text(self):
          
          result = []
          lower_cmp = lambda x, y: cmp(x[0].lower(), y[0].lower())
          for key, value in sorted(self.params.items(), cmp=lower_cmp):
              result.append("%s%s" % (key, value))
          return "".join(result)
docs: Return the text needed for signing using SignatureVersion 1.