Python爬虫获取图片并下载保存至本地的实例

Posted 2020-12-28 tiao

今天小编就为大家分享一篇Python爬虫获取图片并下载保存在本地的实例，具有很好的参考价值，希望对大家有所帮助。一起来看看吧！

 

 

1.抓取煎蛋网上的图片

2.代码如下

* * *

import urllib.request

import os


def url_open(url):

 req=urllib.request.Request(url)

 req.add_header(‘User-Agent‘,‘Mozilla/5.0 (Windows NT 6.3; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0‘)

 response=urllib.request.urlopen(url)

 html=response.read()

 return html

#
to get the num of page like 1,2,3,4...

def get_page(url):

 html=url_open(url).decode(‘utf-8‘)

 a=html.find(‘current-comment-page‘)+23 #add the 23 offset th arrive at the [2356]

 b=html.find(‘]‘,a)

 print(html[a:b])

 return html[a:b]

find the url of imgs and return the url of arr

def find_imgs(url):

 html=url_open(url).decode(‘utf-8‘)

 img_addrs=[]

 a=html.find(‘img src=‘)

 while a!=-1:

  b=html.find(‘.jpg‘,a,a+255) # if false : return -1

  if b!=-1:

   img_addrs.append(‘http:‘+html[a+9:b+4])

  else:

   b=a+9

  a=html.find(‘img src=‘,b)

print(img_addrs) 

 return img_addrs

 print(‘http:‘+each)

save the imgs

def save_imgs(folder,img_addrs):

 for each in img_addrs:

  filename=each.split(‘/‘)[-1] #get the last member of arr,that is the name

  with open(filename,‘wb‘) as f:

   img = url_open(each)

   f.write(img)

def download_mm(folder=‘mm‘,pages=10):

 os.mkdir(folder)

 os.chdir(folder)

 url=‘http://jandan.net/ooxx/‘

 page_num=int(get_page(url))

 for i in range(pages):

  page_num -= i

  page_url = url + ‘page-‘ + str(page_num) + ‘#comments‘

  img_addrs=find_imgs(page_url)

  save_imgs(folder,img_addrs)

if __name__ == ‘__main__‘:

 download_mm()

* * *

以上这篇Python爬虫获取图片并下载保存至本地的实例就是小编分享给大家的全部内容了，希望给大家一个参考，也希望大家多多支持小编！

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