聊天服务器引发TypeError：描述符'encode'需要'str'对象，但接收到'unicode

Question

我对Python的Socket编程还是个初学者。我做了一个聊天服务器，但它运行得不太对。

接收数据的部分没问题，但发送数据时就出问题了。当我使用'conn.send()'时，客户端根本收不到消息。请帮帮我。

This is my code for the socket server:

'''
    Simple socket server using threads
'''

import socket
import sys
from _thread import *

HOST = ''   # Symbolic name meaning all available interfaces
PORT = 8888 # Arbitrary non-privileged port

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print ( 'Socket created on Port: '+str(PORT))

#Bind socket to local host and port
try:
    s.bind((HOST, PORT))
except socket.error as msg:
    print ( 'Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1])
    sys.exit()

print ( 'Socket bind complete')

#Start listening on socket
s.listen(10)
print ( 'Socket now listening')

connectmsg = 'Welcome to OmniBean\'s Chat server!'
#Function for handling connections. This will be used to create threads
def clientthread(conn):
    #Sending message to connected client
    print('Sending Welcome Message...')
    #print(conn)
    conn.send(str.encode(connectmsg)) #send only takes string ENCODED!

    #infinite loop so that function do not terminate and thread do not end.
    while True:

        #Receiving from client
        data = bytes.decode(conn.recv(1024))
        print (data)
        reply = 'OK...' + data
        if not data:
            break

        conn.sendall(str.encode(reply))

    #came out of loop
    conn.close()

#now keep talking with the client
while 1:
    #wait to accept a connection - blocking call
    conn, addr = s.accept()
    print ( 'Connected with ' + addr[0] + ':' + str(addr[1]))
    conn.send(str.encode(connectmsg)) 
    #start new thread takes 1st argument as a function name to be run, second is the tuple of arguments to the function.
    start_new_thread(clientthread ,(conn,))

s.close()

如果你能找出原因，能告诉我吗？我的客户端代码在这里：我的客户端使用的是SimpleNet库，这个库来自OmniBean

import os
from simplenet import *
myname = input ('Enter a login name: ')
host = input('Enter Host Name: ')
port = input('Enter Host Port: ')
connect(host,port)
welcome = receive()
input('Received Message: '+welcome)
while True:
    os.system('cls')
    #room = receive()
    #print (room)
    msg = input('Enter a message to send to server: ')
    send(myname+': '+msg)

理论上来说，因为我从服务器发送了两次数据，客户端应该能收到这些数据；然而，客户端却一直在等待服务器的消息，但消息就是不来。请帮我解决这个问题。

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聊天服务器引发TypeError：描述符'encode'需要'str'对象，但接收到'unicode

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