struck

import struct#b'\x0c\x00\x00\x00'print(struct.pack('i',12))s = struct.pack('i',12)print(struct.unpack('i',s)[0])复制代码

socket_server_tcp

from socket import *import subprocessimport struct# ip_port = ('127.0.0.1',8080)# back_log=5# buffer_size = 1024## tcp_server = socket(AF_INET,SOCK_STREAM)# tcp_server.bind(ip_port)# tcp_server.listen(back_log)## while True:#     conn,addr = tcp_server.accept()#     print('新的客户端链接',addr)#     while True:#         try:#             cmd=conn.recv(buffer_size)#             print('收到的客户端的命令',cmd)##             res = subprocess.Popen(cmd.decode('utf-8'), shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE)#             err = res.stderr.read()#             if err:#                 cmd_res = err#             else:#                 cmd_res = res.stdout.read()##             if not cmd_res:#                 cmd_res = '执行成功'.encode('gbk')#             #计算数据长度#             length =len(cmd_res)#             data_length=str#             #将数据长度发送给客户端#             conn.send(str(length).encode('utf-8'))#             #服务端接收到客户端发送的准备指令#             client_ready = conn.recv(buffer_size)#             #真正的进行发送数据#             if client_ready == b'ready':#                 conn.send(cmd_res)#         except Exception as e:#             print(e)#             break#------------------------------------------------------ip_port = ('127.0.0.1',8080)back_log=5buffer_size = 1024tcp_server = socket(AF_INET,SOCK_STREAM)tcp_server.bind(ip_port)tcp_server.listen(back_log)while True:    conn,addr = tcp_server.accept()    print('新的客户端链接',addr)    while True:        try:            cmd=conn.recv(buffer_size)            print('收到的客户端的命令',cmd)            res = subprocess.Popen(cmd.decode('utf-8'), shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE)            err = res.stderr.read()            if err:                cmd_res = err            else:                cmd_res = res.stdout.read()            if not cmd_res:                cmd_res = '执行成功'.encode('gbk')            #计算数据长度            length =len(cmd_res)            data_length=struct.pack('i',length)            #此时已知第一次发送的长度是4个字节            conn.send(data_length)            conn.send(cmd_res)        except Exception as e:            print(e)            break复制代码

socket_client_tcp

from socket import *import structfrom functools import partial# ip_port = ('127.0.0.1',8080)# back_log=5# buffer_size=1024## tcp_client = socket(AF_INET,SOCK_STREAM)# tcp_client.connect(ip_port)## while True:#     cmd = input('>>:').strip()#     if not cmd:continue#     if cmd == 'quit':break#     tcp_client.send(cmd.encode('utf-8'))#     #解决粘包#     #客户端接收到服务端发送的数据长度#     length = tcp_client.recv(buffer_size)#     #客户端发送一个自定义的准备操作#     tcp_client.send(b'ready')#     length = int(length.decode('utf-8'))##     recv_size = 0#     recv_msg =b''#     while recv_size 
    
     >:').strip()    if not cmd:continue    if cmd == 'quit':break    tcp_client.send(cmd.encode('utf-8'))    #解决粘包    length_data = tcp_client.recv(4)    length = struct.unpack('i',length_data)[0]    # recv_size = 0    # recv_msg = b''    # while recv_size 
    

iter补充

l = ['a','b','c','d']def test():    return l.pop()x = iter(test,'b')print(x.__next__())print(x.__next__())print(x.__next__())from functools import partialdef add(x,y):    return x+yprint(add(1,2))func = partial(add,1)print(func(1))print(func(2))复制代码