bzoj data spider

# -*- coding: utf-8 -*-
import requests
import sys
import re
import os
import time
def mkdir(path):
  folder=os.path.exists(path)
  if not folder:
    if not folder:
      os.makedirs(path)

r_url="http://darkbzoj.tk/data/"
root="C:\\Users\MySakure\OneDrive - smail.hunnu.edu.cn\\task\\bzoj\\"
headers = {'Cookie': '__cfduid=d6faa192ae5f2d57da950ac0bd056eaf41569333917; PHPSESSID=5fcsgf440g962ur3bpk13nej97; uoj_username=Mysakure; uoj_username_checksum=45fd50199b1b6c5949aeee8b15b6b16d; uoj_remember_token=pfAW5yNe7AMZ06fGoCZpIHcBnhxxmceuBzupe1V4lAzuUtD3BC48lNCWRc2e; uoj_remember_token_checksum=b8a77a027da07c1d22fff455d95b959e; uoj_preferred_language=C%2B%2B; cf_clearance=cb17d6598a9dc1a328a1c07764b842545a44b5ca-1570937841-0-150',
  'Host': 'darkbzoj.tk',
'Pragma': 'no-cache',
'Referer': 'http://darkbzoj.tk/data/',
  'Sec-Fetch-Mode': 'no-cors',
'User-Agent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Mobile Safari/537.36'}
for i in range(1000,4999):
  url=r_url+str(i)+".zip"
  print(url)
  zip=requests.get(url,headers=headers)
  with open(root + str(i) + ".zip", 'wb') as file:
    file.write(zip.content)
    #time.sleep(1)