day03——抓取豌豆荚app数据

'''
爬取豌豆荚app数据
        spider_method:
            requests + bs4
                or
            selenium

        url:
            https://www.wandoujia.com/category/6001

        data:
            名称、详情页url、下载人数、app大小
            app_name, detail_url, download_num, app_size
'''

from bs4 import BeautifulSoup
# 爬虫三部曲
# 1.发送请求
import requests
   def get_page(url):
    reponse = requests.get(url)
    # print(reponse.text)
    return reponse

# 2.解析数据
import re
def parse_index(html):
    game_list = re.findall('<h2 class="app-title-h2"><a  href="(.*?)"  title="(.*?)" class="name">.*?</a>.*?<span class="install-count">(.*?)万人安装</span>  <span class="dot">・</span> <span title="(.*?)MB">.*?MB</span>',
                html, 
                re.S)
    print(game_list)
    return game_list

# 3.保存数据
def save_data(game):
    app_name, detail_url, download_num, app_size = game
    data = f'''
                =========欢迎=========
                游戏名称：{app_name}
                详情页url：{detail_url}
                下载人数：{download_num}万人
                app大小：{app_size}MB
                =========再见=========
                \n
            '''
    print(data)
    with open('wandoujia.txt', 'a', encoding='utf-8') as f:
        f.write(data)

if __name__ == '__main__':
    # 拼接主页
    url = f'https://www.wandoujia.com/category/6001'
    print(url)
    # 1.往主页发送请求
    index_res = get_page(url)
    # 2.解析主页获取游戏信息
    game_list = parse_index(index_res.text)
    for game in game_list:
        # 3.保存数据
        # print(game_list)
        save_data(game)