python3 爬照片報錯TypeError: expected string or bytes-like object

Question

#!/usr/local/bin/python3.7
import urllib.request as urlre
import re

def open_url(url):
  req = urlre.Request(url)
  req.add_header('User-Agent','Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36')
  page = urlre.urlopen(req)
  html = page.read().decode('utf-8')

  print(type(html)) 

  return html


def get_img(html):
  p = r'src="(.+?\.jpg)" pic_ex'
  imgsa = re.compile(p)
  imglist = re.findall(imgsa,html)

  return imglist

  for each in imglist:
    print(each)

  x = 0
  for each in imglist:
    urlre.urlretrieve(each,':\\%s.jpg' % x)
    x += 1




if __name__ == "__main__":
  url ='http://tieba.baidu.com/p/2460150866'
  get_img(open_url)

return _compile(pattern, flags).findall(string)
TypeError: expected string or bytes-like object

Answer 1

翻译一下
TypeError: expected string or bytes-like object
需要字符串或类似字节的对象

if name == "__main__":
url ='http://tieba.baidu.com/p/2460150866'
get_img(open_url)

open_url需要的参数呢？？？