输入关键字从百度贴吧下载相应的图片

import requests
from lxml import etree

class TieBa(object):
    def __init__(self,query_string):
        self.query_string = query_string
        self.base_url = 'https://tieba.baidu.com/f'
        self.headers = {"User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64) "
                                      "AppleWebKit/537.36 (KHTML, like Gecko) "
                                     }

    def params(self):
        para = {"kw": self.query_string}
        return para

    def send_request(self,url, parms={}):
        response = requests.get(url, params= parms, headers = self.headers)
        return response.content

    # 2. 数据类型转换,提取数据
    def parse_data(self, data, rule):
        html_data = etree.HTML(data)
        data_list = html_data.xpath(rule)
        return data_list

    # 3. 保存数据
    def save_data(self, data, name):
        print(name)
        image_path = "D:/img/" + name
        with open(image_path, 'wb') as f:
            f.write(data)

    # 主要运行的方法
    def run(self):
        tieba_params = self.params()
        datas = self.send_request(self.base_url,tieba_params)

        #xpath解析
        detail_rule = '//div[@class="t_con cleafix"]/div/div/div/a/@href'
        url_list = self.parse_data(datas, detail_rule)

        for label in url_list:
            image_url = 'https://tieba.baidu.com' + label
            detail_data = self.send_request(image_url)

            # 解析图片
            detail_url = '//img[@class="BDE_Image"]/@src'
            image_url_list = self.parse_data(detail_data, detail_url)

            for image_url_1 in image_url_list:
                image_data = self.send_request(image_url_1)
                image_name = image_url_1[-12:]
                #保存图片
                self.save_data(image_data, image_name)

if __name__ =='__main__':
    a = input('请先在D盘创建一个名为img的文件夹来接收图片
'
              '接下来请输入你要查询的关键字: ')
    tieba = TieBa(a)
    tieba.run()