问Web3.py错误:不支持的类型:基本参数必须是:字节、字节数组之一

EN

 import web3,time from datetime import datetime from solc import compile_source from web3 import Web3,HTTPProvider from web3.contract import ConciseContract from eth_account import Account import csv,random,sys from web3.auto import w3 import binascii number_of_files=0;


def deploy_contract(compiled_sol):


    print('Deploying contract ..')
    contract_id, contract_interface = compiled_sol.popitem()
    w3 = Web3(Web3.HTTPProvider('http://192.168.122.31:8543'))
    if(w3.isConnected()):
        print('we are connected!')
    else:
       print('Sorry not connnected!')
    # w3.eth.enable_unaudited_features()
    account = Account()
    acct = account.privateKeyToAccount(private_key)

    contract_ = w3.eth.contract(abi = contract_interface['abi'], bytecode = contract_interface['bin'])
    print('We have done this  ',contract_)
    print(acct.address)
    unlocked = w3.geth.personal.unlock_account(acct.address,"xx")

    contract_data = contract_.constructor().buildTransaction({
            'from': acct.address,
            'gas': 1728712,
            'gasPrice':w3.toWei('21','gwei'),
            'chainId': 5333
        })


    print('Transaction built ....')
    contract_data['to']=""

    trans_hash = w3.eth.sendTransaction(contract_data)
    time_transaction_sent = datetime.now()
    receipt = w3.eth.waitForTransactionReceipt(trans_hash.hex())

    time_receipt_recieved = datetime.now()
    block_n = receipt['blockNumber']
    gas_used = receipt['gasUsed']
    contract_address = receipt['contractAddress'] contract_code = 

pragma solidity ^0.4.25;

contract SimpleStorage {
    string source_address;
    string dest_address;
    uint protocol;
    constructor() public {
        field_one = '';
        field_two = '';
        field_three = 0;
    }
    function set_params (string field_one, string field_two, uint field_three) public {
        field_one=field_one;
        field_two=field_two;
        field_three=field_three;
    }

    function get_field_one() public returns (string) {
        return field_one;
    }
    function get_field_two() public returns (string) {
        return field_two;
    }
    function get_field_three() public returns (uint) {
        return field_three;
    }
    function get_time_stamp() public returns (uint256){
        return now;
    } }

try:
    compiled_sol = compile_source(contract_code)
    time_compilation_ended = datetime.now()
    print('compiled source ..')
    deploy_contract(compiled_sol) except Exception as e:
    print(e, 'Error in contract code') ``