从客户端线程(线程，python)修改服务器变量 [英] Modify server's variable from client's thread (threading, python)

问题描述

我用Python实现了一个简单的网络游戏"-服务器绘制一个随机数，然后客户端尝试猜测它.我的应用程序运行良好，当客户端猜出该数字时，它将与服务器断开连接(由客户端处理).

I implemented a simple network 'game' in Python - server draws a random number, and then the client tries to guess it. My application works great, when the client guesses the number, it disconnects from server (it is handled on client's side).

但是，经过适当的猜测之后，数字仍然相同.我想修改该应用程序，以便当客户端猜出该数字时，服务器应随后借出一个新数字，以便其他客户端猜出该新数字.我该怎么办?

However, after the proper guess, the number is still the same. I would like to modify the application, such that when the client guesses the number, the server should then rand a new number, so other clients should guess the new one. How can I do this?

一些模板，只是为了引起注意:

Some template, just to draw an attention to the problem:

#!/usr/bin/env python

from random import randint
import socket, select
from time import gmtime, strftime
import threading
import sys

class Handler(threading.Thread):
    def __init__(self, connection, randomnumber):
        threading.Thread.__init__(self)
        self.connection = connection
        self.randomnumber = randomnumber

    def run(self):
        while True:
            try:
                data = self.connection.recv(1024)

                if data:

                    print data

                    try:
                        num = int(data)

                        if Server.guess(num) :
                            msg = "You won! This is the right number!"
                            self.connection.send(msg)
                            break
                        else :
                            msg = "Try again!"
                            self.connection.send(msg)


                    except ValueError, e:
                        msg = "%s" % e
                        self.connection.send(msg)
                else:
                    msg = "error"
                    self.connection.send(msg)

            except socket.error:
                self.connection.close()
                break
        self.connection.close()


class Server:
    def __init__(self, ip, port):
        self.ip = ip
        self.port = port
        self.address = (self.ip, self.port)
        self.server_socket = None
        self.randnum = randint(1, 100)


    @classmethod
    def guess(cls, no):
        if cls.randnum == no:
            cls.randnum = randint(1, 1000)
            result = True
        else:
            result = False
        return reslut

    def run(self):
        try:
            self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            self.server_socket.bind((self.ip, self.port))
            self.server_socket.listen(10)

            print 'Num is %s' % self.randnum

            while True:
                connection, (ip, port) = self.server_socket.accept()

                c = Handler(connection, self.randnum)
                c.start()

        except socket.error, e:
            if self.server_socket:
                self.server_socket.close()
            sys.exit(1)


if __name__ == '__main__':
    s = Server('127.0.0.1', 1234)
    s.run()

推荐答案

生成在服务器和所有客户端之间共享的随机数，应该仅此实例，因此应为class属性.
添加一个类函数guess，该函数在错误的猜测时返回False，在正确的猜测中更改randnum并返回True

Generate the random number that is shared between both server and all the client, there should be only instance of this, hence this should be class attribute.
Add a class function guess which return False upon incorrect guess and upon correct guess changes the randnum and returns True

class Server:
    randnum = randint(1, 1000)  # class attribute created

    @classmethod
    def guess(cls, no):        # To be used "guess" if `no` attribute if the same as `cls.randnum`
        if cls.randnum == no:
            cls.randnum = randint(1, 1000)
            result = True
        else:
            result = False
        return result

    def __init__(self, ip, port):
         # ...

客户端每次应调用此Server.guess函数.

The client should call this Server.guess function each time.

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