Python crawls avatar website pictures

import urllib.request
from urllib import request
from bs4 import BeautifulSoup
x=1
url = 'https://www.woyaogexing.com/touxiang/fengjing/'
def hiking(url):
    head = {
    
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36'}
    req = request.Request(url,headers=head)
    page = urllib.request.urlopen(req)
    contents = page.read()

    soup = BeautifulSoup(contents,'html.parser')
    my_picture = soup.find_all('img')
    for picture in my_picture:
        link = picture.get('src')
        a = 'https:'
        aa = a + link    #拼接出完整链接
        print(aa)
        global x
        urllib.request.urlretrieve(aa, 'allimage\%s.jpeg' % x)
        print("正在下载第%s张图片" % x)
        x += 1

for page in range(1,3):              #https://www.woyaogexing.com/touxiang/fengjing/index_2.html
    page+=1
    url = 'https://www.woyaogexing.com/touxiang/fengjing/index_%s.html'%page
    hiking(url)