写一个客户端，实现给服务端发送hello World字符串，将客户端发送的数据变成大写后返回
#本机id是192.168.xx.xy
#服务端
import socket
soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
soc.bind(('192.168.xx.69', 8080)) #服务端用本机IP地址
soc.listen(5)
print('xxxx')
conn,addr = soc.accept()
print('yyyy')
print(addr)
data = conn.recv(1024)
print('我收到客户端发送', data)
data= data.upper()
conn.send(data)
conn.close()
soc.close()
#客户端
import socket
soc = socket.socket()
soc.connect(('192.168.xx.64',8080))#客户端用服务端IP地址
soc.send(b'hello world')
data = soc.recv(1024)
print('hello world', data)
soc.close()
