import subprocess
import socket
ip_bind = ("127.0.0.1",9000)
client = socket.socket()
client.connect(ip_bind)
l1 = []
while True:
    option = input("client:")
    client.sendall(bytes(option,encoding="utf-8"))
    server_data_size = client.recv(50)
    print(server_data_size)
    a = str(server_data_size,encoding="utf-8").strip()
    print(a)
    l1 = a.split(":")
    print(l1)
    if l1[0] == "server_data_size":
        client_size_tmp = l1[1]
        print(client_size_tmp)
        client_size = int(client_size_tmp)
        print(type(client_size))
    client.send(bytes("ok",encoding="utf-8"))
    receive_size = 0
    res = ""
    while receive_size < client_size:
        server_data = http://www.mamicode.com/client.recv(100)"-------reveive down---------")

import subprocess
import socket
ip_bind = ("127.0.0.1",9000)
server = socket.socket()
server.bind(ip_bind)
server.listen(1)
print("server is waiting........")
conn,add = server.accept()
print("server is connected client")
while True:
    client_data = http://www.mamicode.com/conn.recv(50)"utf-8"),stdout=subprocess.PIPE)
    b = a.stdout.read()
    server_data_size = "server_data_size:" + str(len(b))
    conn.sendall(bytes(server_data_size,encoding="utf-8"))
    client_ack = conn.recv(10)
    if str(client_ack,encoding="utf-8") == "ok":
        conn.sendall(b)