python3 爬取图片的实例代码

#coding=utf8
from urllib import request
import re
import urllib,os
url=\'http://tieba.baidu.com/p/3840085725\'
def get_image(url):
  #获取页面源码
  page = urllib.request.urlopen(url)
  html = page.read()
  #解码，否则报错
  html = html.decode(\'utf8\')
  #正则匹配获取（）的内容
  reg = r\'src=\"(https.+?.[jpg,png])\"\'
  imge = re.compile(reg)
  # 获取正则匹配的数据，\"(.+?.jpg)\" 的数据，返回一个list
  imglist = imge.findall(html)
  return imglist
def save_img(imglist):
  dir = os.path.join(os.path.dirname(__file__),\'img\')
  i=1
  for img in imglist:
    #python3格式化字符串的另一种写法
    imgpath = f\'{dir}\\\\image{i}.jpg\'
    try:
      #urlretrieve下载图片并保存到本地
      urllib.request.urlretrieve(img,imgpath)
      i += 1
      print(u\'图片开始下载\')
    except Exception:
      print(f\'image:{img}下载失败\')
      continue
imglist = get_image(url)
save_img(imglist)