需求实现一个多进程版本的copy器
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()
