import time import multiprocessing from proxypool.processors.server import app from proxypool.processors.getter import Getter from proxypool.processors.tester import Tester from proxypool.setting import CYCLE_GETTER, CYCLE_TESTER, API_HOST, API_THREADED, API_PORT, ENABLE_SERVER, \ ENABLE_GETTER, ENABLE_TESTER, IS_WINDOWS from loguru import logger if IS_WINDOWS: multiprocessing.freeze_support() tester_process, getter_process, server_process = None, None, None class Scheduler(): def run_tester(self, cycle=CYCLE_TESTER): if not ENABLE_TESTER: logger.info('tester not enabled, exit') return tester = Tester() loop = 0 while True: logger.debug(f'tester loop {loop} start...') tester.run() loop += 1 time.sleep(cycle) # CYCLE_GETTER=100 def run_getter(self, cycle=CYCLE_GETTER): if not ENABLE_GETTER: logger.info('getter not enabled, exit') return getter = Getter() loop = 0 while True: logger.debug(f'getter loop {loop} start...') getter.run() loop += 1 time.sleep(cycle) def run_server(self): if not ENABLE_SERVER: logger.info('server not enabled, exit') return app.run(host=API_HOST, port=API_PORT, threaded=API_THREADED) def run(self): global tester_process, getter_process, server_process try: logger.info('starting proxypool...') if ENABLE_TESTER: tester_process = multiprocessing.Process(target=self.run_tester) logger.info(f'starting tester, pid {tester_process.pid}...') tester_process.start() if ENABLE_GETTER: getter_process = multiprocessing.Process(target=self.run_getter) logger.info(f'starting getter, pid{getter_process.pid}...') getter_process.start() if ENABLE_SERVER: server_process = multiprocessing.Process(target=self.run_server) logger.info(f'starting server, pid{server_process.pid}...') server_process.start() tester_process.join() getter_process.join() server_process.join() except KeyboardInterrupt: logger.info('received keyboard interrupt signal') tester_process.terminate() getter_process.terminate() server_process.terminate() finally: # must call join method before calling is_alive tester_process.join() getter_process.join() server_process.join() logger.info(f'tester is {"alive" if tester_process.is_alive() else "dead"}') logger.info(f'getter is {"alive" if getter_process.is_alive() else "dead"}') logger.info(f'server is {"alive" if server_process.is_alive() else "dead"}') logger.info('proxy terminated') if name == 'main': scheduler = Scheduler() scheduler.run()给这段代码加注释

这段代码是一个代理池的调度程序，用于获取代理IP并测试其可用性。下面是对代码的详细注释：

import time 
import multiprocessing 
from proxypool.processors.server import app # 导入 server 模块 
from proxypool.processors.getter import Getter # 导入 getter 模块 
from proxypool.processors.tester import Tester # 导入 tester 模块 
from proxypool.setting import CYCLE_GETTER, CYCLE_TESTER, API_HOST, API_THREADED, API_PORT, ENABLE_SERVER, ENABLE_GETTER, ENABLE_TESTER, IS_WINDOWS # 导入配置文件 
from loguru import logger # 导入日志库 

if IS_WINDOWS: 
    multiprocessing.freeze_support() # Windows 平台需要调用这个函数 

tester_process, getter_process, server_process = None, None, None # 定义进程对象 

class Scheduler():
    def run_tester(self, cycle=CYCLE_TESTER): # 定义 tester 进程的运行函数 
        if not ENABLE_TESTER: # 若不需要测试，则直接退出 
            logger.info('tester not enabled, exit') 
            return 
        tester = Tester() 
        loop = 0 
        while True: 
            logger.debug(f'tester loop {loop} start...') 
            tester.run() # 运行 tester 
            loop += 1 
            time.sleep(cycle) # 循环周期 

    def run_getter(self, cycle=CYCLE_GETTER): # 定义 getter 进程的运行函数 
        if not ENABLE_GETTER: # 若不需要获取，则直接退出 
            logger.info('getter not enabled, exit') 
            return 
        getter = Getter() 
        loop = 0 
        while True: 
            logger.debug(f'getter loop {loop} start...') 
            getter.run() # 运行 getter 
            loop += 1 
            time.sleep(cycle) # 循环周期 

    def run_server(self): # 定义 server 进程的运行函数 
        if not ENABLE_SERVER: # 若不需要启动 server，则直接退出 
            logger.info('server not enabled, exit') 
            return 
        app.run(host=API_HOST, port=API_PORT, threaded=API_THREADED) # 运行 server 

    def run(self): # 定义调度程序的运行函数 
        global tester_process, getter_process, server_process # 定义全局变量 
        try: 
            logger.info('starting proxypool...') 
            if ENABLE_TESTER: # 若需要测试，则启动 tester 进程 
                tester_process = multiprocessing.Process(target=self.run_tester) 
                logger.info(f'starting tester, pid {tester_process.pid}...') 
                tester_process.start() 
            if ENABLE_GETTER: # 若需要获取，则启动 getter 进程 
                getter_process = multiprocessing.Process(target=self.run_getter) 
                logger.info(f'starting getter, pid{getter_process.pid}...') 
                getter_process.start() 
            if ENABLE_SERVER: # 若需要启动 server，则启动 server 进程 
                server_process = multiprocessing.Process(target=self.run_server) 
                logger.info(f'starting server, pid{server_process.pid}...') 
                server_process.start() 
            tester_process.join() # 等待 tester 进程结束 
            getter_process.join() # 等待 getter 进程结束 
            server_process.join() # 等待 server 进程结束 
        except KeyboardInterrupt: # 捕获键盘中断信号 
            logger.info('received keyboard interrupt signal') 
            tester_process.terminate() # 终止 tester 进程 
            getter_process.terminate() # 终止 getter 进程 
            server_process.terminate() # 终止 server 进程 
        finally: # 无论如何都要关闭进程 
            tester_process.join() # 等待 tester 进程结束 
            getter_process.join() # 等待 getter 进程结束 
            server_process.join() # 等待 server 进程结束 
            logger.info(f'tester is {"alive" if tester_process.is_alive() else "dead"}') 
            logger.info(f'getter is {"alive" if getter_process.is_alive() else "dead"}') 
            logger.info(f'server is {"alive" if server_process.is_alive() else "dead"}') 
            logger.info('proxy terminated') 

if __name__ == '__main__': 
    scheduler = Scheduler() 
    scheduler.run() # 运行调度程序 

这段代码中启动了三个进程：tester 进程用于测试代理 IP 的可用性，getter 进程用于获取代理 IP，server 进程用于提供代理 IP 的 API 接口。其中，每个进程都有自己的运行函数，它们会循环运行并在一定时间间隔内执行一次相应的操作。如果不需要某个进程，则会直接退出。调度程序会等待所有进程运行结束，并在捕获到键盘中断信号时及时关闭进程。