Python3批量爬取网页图片

  所谓爬取其实就是获取链接的内容保存到本地。所以爬之前需要先知道要爬的链接是什么。

  要爬取的页面是这个：http://findicons.com/pack/2787/beautiful_flat_icons

里面有很多不错的图标，目标就是把这些文件图片爬下来，保存成本地图片。

用python3怎么做呢？

第一步：获取要爬取的母网页的内容

import urllib.request
import re

url = "http://findicons.com/pack/2787/beautiful_flat_icons"
webPage=urllib.request.urlopen(url)
data = webPage.read()
data = data.decode('UTF-8')

第二步：对母网页内容处理，提取出里面的图片链接

k = re.split(r's+',data)
s = []
sp = []
si = []
for i in k :
    if (re.match(r'src',i) or re.match(r'href',i)):
        if (not re.match(r'href="#"',i)):
            if (re.match(r'.*?png"',i) or re.match(r'.*?ico"',i)):
                if (re.match(r'src',i)):
                    s.append(i)

for it in s :
    if (re.match(r'.*?png"',it)):
        sp.append(it)

第三步：获取这些图片链接的内容，并保存成本地图片

cnt = 0
cou = 1
for it in sp:
    m = re.search(r'src="(.*?)"',it)
    iturl = m.group(1)
    print(iturl)
    if (iturl[0]=='/'):
        continue;
    web = urllib.request.urlopen(iturl)
    itdata = web.read()
    if (cnt%3==1 and cnt>=4 and cou<=30):
        f = open('d:/pythoncode/simplecodes/image/'+str(cou)+'.png',"wb")
        cou = cou+1
        f.write(itdata)
        f.close()
        print(it)
    cnt = cnt+1

保存目录可以自行设定。

以下是综合起来的代码：

import urllib.request
import re

url = "http://findicons.com/pack/2787/beautiful_flat_icons"
webPage=urllib.request.urlopen(url)
data = webPage.read()
data = data.decode('UTF-8')

k = re.split(r's+',data)
s = []
sp = []
si = []
for i in k :
    if (re.match(r'src',i) or re.match(r'href',i)):
        if (not re.match(r'href="#"',i)):
            if (re.match(r'.*?png"',i) or re.match(r'.*?ico"',i)):
                if (re.match(r'src',i)):
                    s.append(i)

for it in s :
    if (re.match(r'.*?png"',it)):
        sp.append(it)

cnt = 0
cou = 1
for it in sp:
    m = re.search(r'src="(.*?)"',it)
    iturl = m.group(1)
    print(iturl)
    if (iturl[0]=='/'):
        continue;
    web = urllib.request.urlopen(iturl)
    itdata = web.read()
    if (cnt%3==1 and cnt>=4 and cou<=30):
        f = open('d:/pythoncode/simplecodes/image/'+str(cou)+'.png',"wb")
        cou = cou+1
        f.write(itdata)
        f.close()
        print(it)
    cnt = cnt+1