Python Socket TypeError: a bytes-like object is required, not 'str' 错误提示
2020-12-13 04:11
标签：出现 not 服务 The wait ted decode localhost and 在学习socket编程时，遇到代码返回如下错误： TypeError: a bytes-like object is required, not ‘str‘ 首先可以明确，在python3中默认的编码方式是unicode。unicode 分为 utf-32(占4个字节),utf-16(占两个字节)，utf-8(占1-4个字节)，因此 utf-16就是现在最常用的unicode版本。 不过考虑到utf8省空间，在文件里存的还是utf-8。 书中示例 服务端 客户端 返回的错误提示： 输入信息时，在客户端输入的是字符串(str类型)，而代码中需要的是bytes类型，带着疑问去查原因，最终在StackOverflow上发现有人也出现同样的问题，且一个叫Scharron的人给出了解答： In python 3, bytes strings and unicodestrings are now two different types. Since sockets are not aware of string encodings, they are using raw bytes strings, that have a slightly differentinterface from unicode strings. So, now, whenever you have a unicode string that you need to use as a byte string, you need to encode() it. And whenyou have a byte string, you need to decode it to use it as a regular(python 2.x) string. Unicode strings are quotes enclosedstrings. Bytes strings are being enclosed strings. When you use client_socket.send(data),replace it by client_socket.send(data.encode()). When you get datausing data = client_socket.recv(512), replace it by data =client_socket.recv(512).decode() 因此，客户端传输信息时需要解码把 str类型 转换 bytes类型 用于传输，在接收到服务端信息后，需要进行编码，再把 bytes类型 转换成 str类型 以下为修改后的代码： 服务端 客户端 欢迎各位指正问题 Python Socket TypeError: a bytes-like object is required, not 'str' 错误提示 标签：出现 not 服务 The wait ted decode localhost and 原文地址：https://www.cnblogs.com/Ames-Lakers/p/11105697.html
发现这里python3.5和Python2.7在套接字返回值解码上有区别。 1 #coding=utf-8
2 #创建TCP服务器
3 from socket import *
4 from time import ctime
5
6 HOST=‘‘
7 PORT=21567
8 BUFSIZ=1024
9 ADDR=(HOST,PORT)
10
11 tcpSerSock=socket(AF_INET,SOCK_STREAM) #创服务器套接字
12 tcpSerSock.bind(ADDR) #套接字与地址绑定
13 tcpSerSock.listen(5) #监听连接,传入连接请求的最大数
14
15 while True:
16 print(‘waiting for connection...‘)
17 tcpCliSock,addr =tcpSerSock.accept()
18 print(‘...connected from:‘,addr)
19
20 while True:
21 data =tcpCliSock.recv(BUFSIZ)
22 #print(‘date=‘,data)
23 if not data:
24 break
25 tcpCliSock.send((‘[%s] %s‘ %(ctime(),data)))
26
27 tcpCliSock.close()
28 tcpSerSock.close()
1 #coding=utf-8
2
3 from socket import *
4
5 HOST = ‘localhost‘ # or ‘localhost‘
6 PORT = 21567
7 BUFSIZ = 1024
8 ADDR=(HOST,PORT)
9
10 tcpCliSock = socket(AF_INET,SOCK_STREAM)
11 tcpCliSock.connect(ADDR)
12
13 while True:
14 data = input(‘> ‘)
15 print(‘data=‘,data);
16 if not data:
17 break
18 tcpCliSock.send(data)
19 data = tcpCliSock.recv(BUFSIZ)
20 if not data:
21 break
22 print(data)
23
24 tcpCliSock.close()
TypeError: a bytes-like object is required, not ‘str’ 1 #coding=utf-8
2 #创建TCP服务器
3 from socket import *
4 from time import ctime
5
6 HOST=‘‘
7 PORT=21567
8 BUFSIZ=1024
9 ADDR=(HOST,PORT)
10
11 tcpSerSock=socket(AF_INET,SOCK_STREAM) #创服务器套接字
12 tcpSerSock.bind(ADDR) #套接字与地址绑定
13 tcpSerSock.listen(5) #监听连接,传入连接请求的最大数
14
15 while True:
16 print(‘waiting for connection...‘)
17 tcpCliSock,addr =tcpSerSock.accept()
18 print(‘...connected from:‘,addr)
19
20 while True:
21 data =tcpCliSock.recv(BUFSIZ).decode()
22 print(‘date=‘,data)
23 if not data:
24 break
25 tcpCliSock.send((‘[%s] %s‘ %(ctime(),data)).encode())
26
27 tcpCliSock.close()
28 tcpSerSock.close()
#coding=utf-8
#创建TCP服务器
from socket import *
from time import ctime
HOST=‘‘
PORT=21567
BUFSIZ=1024
ADDR=(HOST,PORT)
tcpSerSock=socket(AF_INET,SOCK_STREAM) #创服务器套接字
tcpSerSock.bind(ADDR) #套接字与地址绑定
tcpSerSock.listen(5) #监听连接,传入连接请求的最大数
while True:
print(‘waiting for connection...‘)
tcpCliSock,addr =tcpSerSock.accept()
print(‘...connected from:‘,addr)
while True:
data =tcpCliSock.recv(BUFSIZ).decode()
print(‘date=‘,data)
if not data:
break
tcpCliSock.send((‘[%s] %s‘ %(ctime(),data)).encode())
tcpCliSock.close()
tcpSerSock.close()
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