from urllib.request import urlopen
from bs4 import BeautifulSoup
import re
html = urlopen("http://www.pythonscraping.com/pages/page3.html")
bsObj = BeautifulSoup(html,"html.parser")
images = bsObj.findAll("img",{"src":re.compile("\.\.\/img\/gifts\/img.*\.jpg")})#每个图片部分路径不同，用正则表达式代换
for image in images:
    print(image["src"])