本文實(shí)例講述了python多進(jìn)程（加入進(jìn)程池）操作。分享給大家供大家參考，具體如下：

一、多進(jìn)程復(fù)制多個(gè)文件

import multiprocessingimport osimport time# 復(fù)制文件，傳入文件名def copy_file(old_file_name, old_name):  new_file_name = 'new_file'  new_name = old_name  if not os.path.exists(new_file_name):    os.makedirs(new_file_name)  with open(old_file_name + '/' + old_name, 'rb') as f:    file_content = f.read()  with open(new_file_name + '/' + new_name, 'wb') as f:    f.write(file_content)if __name__ == '__main__':  old_file_name = 'old_file'  name_list = os.listdir(old_file_name)  time_old = time.time()  for name in name_list:    process = multiprocessing.Process(target=copy_file, args=(old_file_name, name))    process.start()  time_new = time.time()  print('執(zhí)行時(shí)間：%f' % (time_new - time_old))

二、優(yōu)化加入進(jìn)程池，并顯示復(fù)制進(jìn)度：

import multiprocessingimport osimport time# 復(fù)制文件，傳入文件名def copy_file(old_file_name, old_name, queue):  new_file_name = 'new_file'  new_name = old_name  if not os.path.exists(new_file_name):    os.makedirs(new_file_name)  with open(old_file_name + '/' + old_name, 'rb') as f:    file_content = f.read()  with open(new_file_name + '/' + new_name, 'wb') as f:    f.write(file_content)    queue.put(new_file_name)if __name__ == '__main__':  old_file_name = 'old_file' #存放文件的文件名  name_list = os.listdir(old_file_name) #取出所有文件的文件名  queue = multiprocessing.Manager().Queue() #創(chuàng)建隊(duì)列對(duì)象，用于計(jì)算復(fù)制完成百分比  po = multiprocessing.Pool(3) #創(chuàng)建線程池  time_old = time.time() #用于計(jì)算花費(fèi)時(shí)間  for name in name_list:    po.apply_async(copy_file, (old_file_name, name, queue))  po.close()  index = 0  while True:    index += 1    queue.get()    print('/r以保存%.2f%%' % ((index / len(name_list)) * 100), end='')    if index == len(name_list):      break  time_new = time.time()  print('執(zhí)行時(shí)間：%f' % (time_new - time_old))

三、多進(jìn)程聊天器：

import multiprocessingimport socketimport threading# 需求：# 1.主進(jìn)程創(chuàng)建一個(gè)TCPconnect# 2.主進(jìn)程connect后創(chuàng)建進(jìn)程開(kāi)啟一個(gè)新的Socketconnect# 3.進(jìn)程里創(chuàng)建線程不斷的接收和提示發(fā)送消息# 有連接時(shí)新創(chuàng)建一個(gè)進(jìn)程處理聊天def speak_send(tcp_msg):  while True:    test = input('請(qǐng)輸入要發(fā)送的消息')    tcp_msg.send(test.encode('utf-8'))def speak_rec(tcp_msg):  while True:    print(tcp_msg.recv(1024).decode('gbk'))# 開(kāi)啟的進(jìn)程聊天def speak_process(tcp_sock, tcp_msg, ip):  print('開(kāi)啟進(jìn)程')  # 5.開(kāi)線程循環(huán)接收消息  msg_rec = threading.Thread(target=speak_rec, args=(tcp_msg,))  # print(tcp_msg.recv(1024).decode('gbk'))  # 6.開(kāi)線程循環(huán)發(fā)送消息  msg_send = threading.Thread(target=speak_send, args=(tcp_msg,))  msg_rec.start()  msg_send.start()  msg_rec.join()  msg_send.join()  # 7.關(guān)閉  # tcp_msg.close()def main():  # 1創(chuàng)建TCP對(duì)象  tcp_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  # 2.綁定ip和端口  tcp_sock.bind(('', 9999))  # 3.改主動(dòng)為被動(dòng)  tcp_sock.listen(128)  # 4.accept接收msg和ip  while True:    tcp_msg, ip = tcp_sock.accept()    process = multiprocessing.Process(target=speak_process, args=(tcp_sock, tcp_msg, ip))    process.start()if __name__ == '__main__':  main()