code: def url(self):
          "Returns the URL that can be visited to obtain a verifier code"
          # The authorize url is always api.xero.com
          query_string = {'oauth_token': self.oauth_token}
  
          if self.scope:
              query_string['scope'] = self.scope
  
          url = XERO_BASE_URL + AUTHORIZE_URL + '?' + \
                urlencode(query_string)
          return urf url(self):
          "Returns the URL that can be visited to obtain a verifier code"
          # The authorize url is always api.xero.com
          query_string = {'oauth_token': self.oauth_token}
  
          if self.scope:
              query_string['scope'] = self.scope
  
          url = XERO_BASE_URL + AUTHORIZE_URL + '?' + \
                urlencode(query_string)
          return url
docs: Returns the URL that can be visited to obtain a verifier code