本文实例讲述了python多线程案例之多任务copy文件。分享给大家供大家参考，具体如下：impor
本文实例讲述了python多线程案例之多任务copy文件。分享给大家供大家参考，具体如下：
import os
import multiprocessing
def copy_file(q,file_name, old_folder_name, new_folder_name):
"""完成文件的复制"""
old_f = open(old_folder_name+"/"+file_name, "rb")
content = old_f.read()
old_f.close()
new_f = open(new_folder_name+"/"+file_name, "wb")
new_f.write(content)
new_f.close()
# print("从%s--->到%s 复制文件%s成功！" % (old_folder_name, new_folder_name, file_name))
q.put(file_name)
def main():
# 1.获取用户要copy的文件夹名称
old_folder_name = input("请输入要copy的文件夹：")
# 2.创建一个新的文件夹
try:
new_folder_name = old_folder_name + "复件"
os.mkdir(new_folder_name)
except:
pass
# 3.获取所有待copy的文件名称 listdir()
file_names = os.listdir(old_folder_name)
print(file_names)
# 4.创建进程池
po = multiprocessing.Pool(2)
# 5.创建一个队列
q = multiprocessing.Manager().Queue()
# 6.向进程池中添加copy文件的任务
for file_name in file_names:
po.apply_async(copy_file, args=(q,file_name, old_folder_name, new_folder_name))
po.close()
# po.join()
all_file_num = len(file_names) # 统计所有的文件个数
copy_ok_num = 0
while True:
file_name = q.get()
# print("已经完成copy ：%s" % file_name)
copy_ok_num += 1
print("\r复制的进度为：%.2f %%" % (copy_ok_num*100/all_file_num),end='')
if copy_ok_num >= all_file_num:
break
if __name__ == '__main__':
main()
