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python - 套接字不会通过 LAN 发送数据

问题描述

我试图制作一个脚本，当按下 WASD 按钮时，它使用套接字通过 LAN 网络将其发送到服务器这里是客户端：

import socket
from pynput.keyboard import Listener

HOST = '127.0.0.1'  # The server's hostname or IP address
PORT = 65432        # The port used by the server

import keyboard 




def On_pressA():
    print("dda")
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
       s.connect((HOST, PORT))
       s.sendall(b'LEFT')
       data = s.recv(1024)
       print('Received', repr(data))

def On_pressW():
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
      s.connect((HOST, PORT))
      s.sendall(b'FORWARD')
      data = s.recv(1024)
      print('Received', repr(data))

def On_pressS():
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
       s.connect((HOST, PORT))
       s.sendall(b'BACKWARDS')
       data = s.recv(1024)
       print('Received', repr(data))

def On_pressD():
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.connect((HOST, PORT))
        s.sendall(b'RIGHT')
        data = s.recv(1024)
        print('Received', repr(data))


with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    keyboard.add_hotkey('a', On_pressA) 
    keyboard.add_hotkey('d', On_pressD())
    keyboard.add_hotkey('s', On_pressS())
    keyboard.add_hotkey('w', On_pressW())
    
    s.sendall(b'LEFT')
    data = s.recv(1025)

当我按预期的方式按 A 时它打印的按键工作但它不会将该数据发送到服务器这里是服务器：

    import socket

HOST = '127.0.0.1'
PORT = 65432
loop = 0
while loop < 5:
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.bind((HOST, PORT))
        s.listen()
        conn, addr = s.accept()
        with conn:
            print('Done', addr)
            while True:
                data = conn.recv(1024)
                print(data)
                if not data:
                    print("Nothing sent")
                conn.sendall

我可能做错了，因为我是 python 新手。我试图用它来制作一个 wifi 远程遥控车。

标签： pythonsocketsnetworkingserverkeyboard

解决方案

这是问题所在：

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    keyboard.add_hotkey('a', On_pressA) 
    keyboard.add_hotkey('d', On_pressD())
    keyboard.add_hotkey('s', On_pressS())
    keyboard.add_hotkey('w', On_pressW())

而不是keyboard.add_hotkey('a', On_pressA)应该是keyboard.add_hotkey('a', On_pressA())（注意()语句末尾的）

最终的代码应该有点像：

import socket
from pynput.keyboard import Listener

HOST = '127.0.0.1'  # The server's hostname or IP address
PORT = 65432        # The port used by the server

import keyboard 




def On_pressA():
    print("dda")
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
       s.connect((HOST, PORT))
       s.sendall(b'LEFT')
       data = s.recv(1024)
       print('Received', repr(data))

def On_pressW():
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
      s.connect((HOST, PORT))
      s.sendall(b'FORWARD')
      data = s.recv(1024)
      print('Received', repr(data))

def On_pressS():
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
       s.connect((HOST, PORT))
       s.sendall(b'BACKWARDS')
       data = s.recv(1024)
       print('Received', repr(data))

def On_pressD():
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.connect((HOST, PORT))
        s.sendall(b'RIGHT')
        data = s.recv(1024)
        print('Received', repr(data))


with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    keyboard.add_hotkey('a', On_pressA()) 
    keyboard.add_hotkey('d', On_pressD())
    keyboard.add_hotkey('s', On_pressS())
    keyboard.add_hotkey('w', On_pressW())
    
    s.sendall(b'LEFT')
    data = s.recv(1025)

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