code: def Allowance(self, wallet, owner_addr, requestor_addr):
          
          invoke_args = [self.ScriptHash.ToString(), 'allowance',
                         [PromptUtils.parse_param(owner_addr, wallet), PromptUtils.parse_param(requestor_addr, wallet)]]
  
          tx, fee, results, num_ops, engine_success = TestInvokeContract(wallet, invoke_args, None, True)
  
          return tx, fee, results
docs: Return the amount of tokens that the `requestor_addr` account can transfer from the `owner_addr` account.
  
          Args:
              wallet (neo.Wallets.Wallet): a wallet instance.
              owner_addr (str): public address of the account to transfer the given amount from.
              requestor_addr (str): public address of the account that requests the transfer.
  
          Returns:
              tuple:
                  InvocationTransaction: the transaction.
                  int: the transaction fee.
                  list: the neo VM evaluation stack results.