1、抓取煎蛋網(wǎng)上的圖片。

2、代碼如下：

import urllib.request

import os

#to open the url

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()

總結(jié)

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