python套接字编程类型错误：类似字节的对象不是必需的

我有一个运行的Python服务器，它监听Python客户机发送的数据。客户机从用户处获取输入，并将其发送到服务器，由服务器打印。然而，我得到的错误是“TyperError:a byte-like-object是必需的，而不是'str'”。它位于客户代码的第8行

服务器代码：

import socket

def server(interface, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    sock.bind((interface, port))
    sock.listen(1)
    print('Listening at', sock.getsockname())
    while True:
        sc, sockname = sock.accept()
        print('We have accepted a connection from', sockname)
        print(' Socket name:', sc.getsockname())
        print(' Socket peer:', sc.getpeername())
        message = sc.recv(1024)
        print(' Incoming sixteen-octet message:', repr(message))
        sc.sendall(b'Farewell, client')
        sc.close()
        print(' Reply sent, socket closed')

if __name__ == '__main__':
    server('0.0.0.0', 9999)

客户端代码：

import socket

def client(host, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.connect((host, port))
    print('Client has been assigned socket name', sock.getsockname())
    command = input("message > ")
    sock.sendall(command)
    reply = sock.recv(1024)
    print('The server said', repr(reply))
    sock.close()

if __name__ == '__main__':
    client('localhost', 9999)

TyperError:需要类似字节的对象，而不是“str”

socket.sendall

需要

字节

，但您已经传入了

输入（“message>”

）的结果，这是一个

str

。因此，您需要以某种方式将

str

从

input

转换为

bytes

。您可以使用

encode

执行此操作：

command = input("message > ").encode()

---

encode

，将

str

编码为

字节

在Python中通信时，您应该将发送的参数编码为字节，并对从字节格式接收的参数进行解码。你可以从下面的代码中理解我想说的话

服务器代码：

import socket

def server(interface, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    sock.bind((interface, port))
    sock.listen(1)
    print('Listening at', sock.getsockname())
    while True:
        sc, sockname = sock.accept()
        print('We have accepted a connection from', sockname)
        print(' Socket name:', sc.getsockname())
        print(' Socket peer:', sc.getpeername())
        message = sc.recv(1024).decode('utf-8')
        print(' Incoming sixteen-octet message:', repr(message))
        sc.sendall(bytes('Farewell, client','utf-8'))
        sc.close()
        print(' Reply sent, socket closed')

if __name__ == '__main__':
    server('0.0.0.0', 9999)

客户端代码：

import socket

def client(host, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.connect((host, port))
    print('Client has been assigned socket name', sock.getsockname())
    command = input("message > ")
    sock.sendall(bytes(command,'utf-8'))
    reply = sock.recv(1024).decode('utf-8)
    print('The server said', repr(reply))
    sock.close()

if __name__ == '__main__':
    client('localhost', 9999)

如果你这样编辑你的代码，我想你会纠正你收到的错误。我希望这对我有所帮助，因为我是新手。对不起，我的初级英语