多任务案例--文件夹copy.py

 import os
 import multiprocessing

 def copy_file(q,file_name,new_folder_name,old_folder_name):
     with open(old_folder_name + "/" + file_name,"rb") as f1, open(new_folder_name + "/" + file_name,"wb") as f2:
         content = f1.read()
         f2.write(content)
     q.put(file_name)

 def main():
     # 1.获取文件夹名字
     old_folder_name = input("请输入想要copy的文件夹的名字：")
     # 2.创建一个新文件夹
     try:
         new_folder_name = old_folder_name + "[复件]"
         os.mkdir(new_folder_name)
     except:
         # 如果创建失败直接pass
         pass
     # 3.获取文件夹里文件的名字
     file_names = os.listdir(old_folder_name)
     # 4.创建进程池
     po = multiprocessing.Pool(5)
     q = multiprocessing.Manager().Queue()
     for file_name in file_names:
         # 5.复制文件到新文件夹里去
         po.apply_async(copy_file,(q,file_name,new_folder_name,old_folder_name))

     po.close()

     # 计算数据
     copy_ok_num = 0
     while True:
         new_file_name = q.get()
         # 记录复制完成的数量
         copy_ok_num+=1
         print("\r拷贝的进度为%.2f %%" % (copy_ok_num * 100 / len(file_names)),end="")
         if copy_ok_num >= len(file_names):
             break

 if __name__ == '__main__':
     main()

请输入想要copy的文件夹的名字：test
拷贝的进度为100.00 %