辅助小程序，帮忙拷贝文件(备忘)

import os
import shutil

dirpath = "D:\\20210309\\t20210310"
isExists = os.path.exists(dirpath)
if not isExists:
os.makedirs(dirpath)
print(dirpath+' 创建成功')

dayStr = "20180126,20180226,20180326"
xlist = dayStr.split(",")
for day in xlist:
FILEPATH="D:\\20210309\\upload"
FILENAME="repay_"+day+".txt"
FILE=FILEPATH + os.sep + day+"\\repay\\"+ FILENAME

if os.path.exists(FILE):
oldname= FILE
newname=dirpath+ os.sep +FILENAME
shutil.copyfile(oldname,newname)
else:
print(FILE+"文件不存在")