使用python的urllib库和正则表达式爬取

学习地址（自行base64解密）：aHR0cDovL3BpYy5uZXRiaWFuLmNvbQ==

网站图片，支持批量下载。

（本文仅供学习交流，请勿商用，侵删）

1.可选择图片类型、下载那几页。

2.源代码

"""
    功能：批量下载网站图片
    时间：2019-5-18 16:14:01
    作者：倚窗听雨
"""
import urllib.request
import re
import os

headers = {
    "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.106 Safari/537.36",
}
tempList = ["pic","netbian","com"]
ur = f"http://{'.'.join(tempList)}"
url_list = []

#获取各类型图片url
def picture(url):
    res = urllib.request.Request(url,data=None,headers=headers)
    html = urllib.request.urlopen(res).read().decode('gbk')

    pic = re.findall(r'<div class="classify clearfix.+</div>',html)
    start = 0
    text = pic[0]
    for i in re.findall(r'<a ',pic[0]):
        a = re.search(r'<a ',text)
        end_a = re.search(r'</a>',text)

        href = url+text[a.start():end_a.end()].split('"')[1]
        title = text[a.start():end_a.end()].split('"')[3]
        d = {'href':href,'title':title}
        url_list.append(d)

        text = text[end_a.end():]

#获取图片链接
def get_pic(url):
    res = urllib.request.Request(url,headers=headers)
    html = urllib.request.urlopen(res).read().decode('gbk')

    page = re.search(r'class="slh".+[\s].+',html).group().split('</a')[0].split('>')[-1]
    print('共',page,'页')
    start_page = int(input('下载起始页：'))
    end_page = int(input('下载到哪页：'))
    total = 0
    for p in range(start_page,end_page+1):
        if p ==1:
            url2 = url + 'index'+'.html'
        else:
            url2 = url + 'index_'+str(p)+'.html'
        print('\n',url2)
        res2 = urllib.request.Request(url2, headers=headers)
        html2 = urllib.request.urlopen(res2).read().decode('gbk')

        texts =re.findall(r'<ul class="clearfix".+[\s]*.+',html2)
        t = texts[0]
        print('准备下载第',p,'页图片......')

        #获取当前页的图片并下载
        for i in re.findall(r'<li>',t):
            start_li = re.search(r'<li>',t)
            end_li = re.search(r'</li>',t)

            href = ur+t[start_li.start():end_li.end()].split('"')[1]
            name = t[start_li.start():end_li.end()].split('b>')[-2][:-2]

            total += download(href,name)
            t = t[end_li.end():]
    print('\n下载完成，共下载{}张图片'.format(total))
#下载图片
def download(url,name):
    res = urllib.request.Request(url, headers=headers)
    html = urllib.request.urlopen(res).read().decode('gbk')
    down_url = re.search(r'<a href="" id="img">.+',html).group()
    down_url = ur + re.split('"',down_url)[5]
    try:
        data = urllib.request.urlopen(down_url,timeout=10).read()
    except Exception as e:
        print(e,'跳过此图片：'+name+'.jpg')
        return 0
    t = -1

    #img目录不存在自动创建
    if not os.path.exists('img'):
        os.makedirs('img')
    #该文件不存在时才下载（存储位置可自行修改，现在存在当前目录的img目录下）
    if not os.path.exists('img\\'+name+'.jpg'):
        with open('img\\'+name+'.jpg','wb')as f:
            f.write(data)
        print(name+'.jpg'+"\t\t下载成功")
        t = 1
    else:
        print(name + '.jpg' + "\t\t已存在")
        t = 0
    return t

#主程序
def main():
    picture(ur)
    print('4k图片网欢迎您'.center(20,'*'))

    for i,v in enumerate(url_list):
        print("{}、{}".format(i+1,v['title']))
    while True:
        try:
            t = int(input('要下载的图片类型（序号）：'))
            if t not in range(1,13):
                raise IndexError
            break
        except ValueError:
            print('请输入正确的序号！')
        except IndexError:
            print('请输入正确的序号！')
    get_pic(url_list[t-1]['href'])


if __name__ == '__main__':
    main()

存储位置可自行修改，现在存在当前目录的img目录下

声明：初次学习爬虫，还有诸多不足，大神勿喷。