python进程池实现的多进程文件夹copy器完整示例

import multiprocessing
import os
import time
import random
def copy_file(queue, file_name,source_folder_name, dest_folder_name):
  """copy文件到指定的路径"""
  f_read = open(source_folder_name + "/" + file_name, "rb")
  f_write = open(dest_folder_name + "/" + file_name, "wb")
  while True:
    time.sleep(random.random())
    content = f_read.read(1024)
    if content:
      f_write.write(content)
    else:
      break
  f_read.close()
  f_write.close()
  # 发送已经拷贝完毕的文件名字
  queue.put(file_name)
def main():
  # 获取要复制的文件夹
  source_folder_name = input("请输入要复制文件夹名字:")
  # 整理目标文件夹
  dest_folder_name = source_folder_name + "[副本]"
  # 创建目标文件夹
  try:
    os.mkdir(dest_folder_name)
  except:
    pass # 如果文件夹已经存在，那么创建会失败
  # 获取这个文件夹中所有的普通文件名
  file_names = os.listdir(source_folder_name)
  # 创建Queue
  queue = multiprocessing.Manager().Queue()
  # 创建进程池
  pool = multiprocessing.Pool(3)
  for file_name in file_names:
    # 向进程池中添加任务
    pool.apply_async(copy_file, args=(queue, file_name, source_folder_name, dest_folder_name))
  # 主进程显示进度
  pool.close()
  all_file_num = len(file_names)
  while True:
    file_name = queue.get()
    if file_name in file_names:
      file_names.remove(file_name)
    copy_rate = (all_file_num-len(file_names))*100/all_file_num
    print("\r%.2f...(%s)" % (copy_rate, file_name) + " "*50, end="")
    if copy_rate >= 100:
      break
  print()
if __name__ == "__main__":
  main()