Biegral Blog

学习编程语言是很枯燥的，尤其是对一个编程零基础的人来说，更为枯燥！所以我们要从枯燥的学习中找点乐趣和动力！比如，抓点小姐姐的图片

完整代码

import os
import time
import requests
from lxml import etree
'''
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'''
def get_img_url(url):
    '''
    :param url: 图集url
    :return: 图集名字和图片地址所构成的字典
    '''
    img = {}#空字典，用于放图片url和对应的编号
    html = requests.get(url)#获取页面源码
    html.encoding = 'gb2312'
    data = etree.HTML(html.text)#解析
    title = data.xpath('//div[@class="wrapper clearfix imgtitle"]/h1/text()')[0]#图集名
    page = data.xpath('//div[@class="wrapper clearfix imgtitle"]/h1/span/span[2]/text()')[0]#图集图片数
    img['1'] = data.xpath('//a[@class="down-btn"]/@href')[0]#第一张的图片地址
    for i in range(2,int(page)+1):
        #其余的图片地址
        img_url = etree.HTML(requests.get(url.replace('.html','_%s.html'%str(i))).text).xpath('//a[@class="down-btn"]/@href')[0]
        img['%s'%str(i)] = img_url#写入字典
    return title,img


def downloader(url,path,name,header={}):
    start = time.time()#开始时间
    if os.path.exists(path):  # 判断路径及文件夹是否存在，不存在即创建
        pass
    else:
        os.mkdir(path)
    size = 0
    if header is None:
        response = requests.get(url, stream=True)#stream属性必须带上
    else:
        response = requests.get(url, stream=True,headers=header)#stream属性必须带上
    chunk_size = 1024#每次下载的数据大小
    content_size = int(response.headers['content-length'])#总大小
    if response.status_code == 200:
        print('[文件大小]:%0.2f MB' % (content_size / chunk_size / 1024))#换算单位并print
        with open(path+'\\%s'%name, "ab") as file:
            for data in response.iter_content(chunk_size=chunk_size):
                file.write(data)
                file.flush()#清空缓存
                size += len(data)#已下载文件大小
                #\r指定行第一个字符开始，搭配end属性完成覆盖进度条
                print('\r'+'[下载进度]:%s%.2f%%' % ('>'*int(size*50/ content_size),float(size / content_size * 100)),end='')
    end = time.time()#结束时间
    print('\n'+"%s下载完成！用时%.2f秒"%(name,(end-start)))

if __name__ == '__main__':
    url_list=[]#放入所有页面url
    url = 'http://www.mmonly.cc/mmtp/'
    url_list.append(url)#先放入第一页
    html = requests.get(url)
    html.encoding = 'gb2312'
    page = etree.HTML(html.text).xpath('//a[text()="末页"]/@href')[0].split('_')[-1].split('.')[0]
    for i in range(2,int(page)+1):
        url_list.append(url+'list_9_{}.html'.format(str(i)))#其余页面url，注意第一页和其他页不一样
    for url_i in url_list:
        img_urls = etree.HTML(requests.get(url_i).text).xpath('//div[@class="ABox"]/a/@href')
        for img_url in img_urls:
            title,imgs = get_img_url(img_url)
            for img in imgs.keys():
                path = 'E:\\python\\mn\\%s' % title
                downloader(url= imgs[img],path=path,name='%s.jpg'%(title+img))