Python线程无法运行

如何解决Python线程无法运行

我正在使用线程在Python上制作服务器程序，您可以在其中使用socket模块进行注册，登录等。我还使用了threading模块来处理多个用户，但是当我运行程序时，它抛出了错误。

这是我的代码：

import threading
import socket
import json

host = socket.gethostbyname(socket.gethostname())
port = 8765

print("IP:",host)

s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.bind((host,port))

with open("users.json") as file:
    users = json.load(file)["users"]

cnts = []

def client():
    c,a = s.accept()

    acc = None

    while 1:
        req = c.recv(1)

        if req == b"b":
            break

        elif req == b"r":
            name = c.recv(c.recv(1)[0])

            if len(name) < 3:
                c.send("\x01")
            elif len(name) > 20:
                c.send("\x02")
            elif name in users:
                c.send("\x03")
            else:
                pwd = c.recv(c.recv(1)[0])

                if len(pwd) < 4:
                    c.send("\x01")
                elif len(pwd) > 12:
                    c.send("\x02")
                else:
                    c.send("\x00")

                    users[name] = pwd
                    acc = name

        elif req == b"s":
            name = c.recv(c.recv(1)[0])

            if name in users:
                pwd = c.recv(c.recv(1)[0])

                if users[name] == pwd:
                    acc = name
                    c.send("\x00")
                else:
                    c.send("\x02")
            else:
                c.send("\x01")

    c.close()

s.listen(1)
quit = 0

while not quit:
    thread = threading.Thread(target=client)
    thread.start()

    cnts.append(thread)

程序输出：

> py server.py
IP: 192.168.0.106
Traceback (most recent call last):
  File "server.py",line 72,in <module>
    thread.start()
  File "C:\Users\hp\AppData\Local\Programs\Python\Python38-32\lib\threading.py",line 852,in start
    _start_new_thread(self._bootstrap,())
RuntimeError: can't start new thread

我是python线程的新手，所以我不明白自己做错了什么。

编辑：已修复。感谢您的回答。

新代码：

import threading
import socket
import json

host = socket.gethostbyname(socket.gethostname())
port = 8765

print("IP:",port))

with open("users.json") as file:
    users = json.load(file)["users"]

cnts = []
waiting = 1

def client():
    global waiting
    c,a = s.accept()
    waiting = 0

    acc = None

    while 1:
        req = c.recv(1)

        if req == b"b":
            break

        elif req == b"r":
            name = c.recv(c.recv(1)[0])

            if len(name) < 3:
                c.send("\x01")
            elif len(name) > 20:
                c.send("\x02")
            elif name in users:
                c.send("\x03")
            else:
                pwd = c.recv(c.recv(1)[0])

                if len(pwd) < 4:
                    c.send("\x01")
                elif len(pwd) > 12:
                    c.send("\x02")
                else:
                    c.send("\x00")

                    users[name] = pwd
                    acc = name

        elif req == b"s":
            name = c.recv(c.recv(1)[0])

            if name in users:
                pwd = c.recv(c.recv(1)[0])

                if users[name] == pwd:
                    acc = name
                    c.send("\x00")
                else:
                    c.send("\x02")
            else:
                c.send("\x01")

    c.close()

s.listen(1)
quit = 0

counter = 0

while not quit:
    thread = threading.Thread(target=client)
    thread.start()

    cnts.append(thread)
    counter += 1

    while waiting:
        pass

    waiting = 1

解决方法

while not quit:主体没有任何阻碍执行的内容，例如input，socket.recv或time.sleep。这意味着，此循环非常快速地执行每个迭代，并且每次迭代都会创建一个新线程。尝试用while not quit:代替for _ in range(3)，以仅产生3个线程。