if __name__ == '__main__': app.run(host='0.0.0.0', port="2022", threaded=True)

这是 Python 程序的主入口，当该程序被直接运行时，会执行 app.run() 函数。这个函数会启动一个 Flask 应用程序，并监听来自任何 IP 地址的客户端连接，端口号为 2022。

其中 host 参数指定了应用程序监听的 IP 地址，'0.0.0.0' 表示监听所有的 IP 地址，而不仅仅是本地的回环地址。port 参数指定了应用程序监听的端口号。

threaded 参数设置为 True，表示开启多线程模式，使得应用程序能够同时处理多个客户端请求，提高了程序的并发性能。

相关问题

os.environ["MKL_NUM_THREADS"] = "1"

This line of code sets the environment variable MKL_NUM_THREADS to 1. MKL stands for Math Kernel Library, which is a highly optimized mathematical computation library developed by Intel. Setting MKL_NUM_THREADS to 1 ensures that only one thread is used for computations, which can be useful for debugging or for ensuring reproducible results in multi-threaded applications. However, it may also result in slower performance for some applications that benefit from parallelization.

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。