爬取双色球数据

上代码:

import requests
from lxml import etree
import pandas as pd


def get_url(url):  # 请求url的方法,返回html
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36',
    }
    response = requests.get(url, headers=headers)  # 获取请求的返回数据
    response.encoding = 'utf-8'  # 定义编码,不然中文输出会乱码;
    if response.status_code == 200:  # 如果请求成功,则返回;
        return response.text
    return None

if __name__ == '__main__':
    res = pd.DataFrame(columns=('开奖日期', '双色球'))#创建表格指定列名
    for q in range(1, 153):  # for循环,一共153页;
        url = 'http://kaijiang.zhcw.com/zhcw/html/ssq/list_%s.html' % (q)  # 定义请求的链接
        html = get_url(url)  # 请求url获取返回代码
        xpath_html = etree.HTML(html)  # xpath初始化html代码
        dates = xpath_html.xpath('//table[@class="wqhgt"]//tr//td[1]//text()')  # 获取开奖日期
        result = xpath_html.xpath('//table[@class="wqhgt"]//tr//em//text()')  # 获取上色球号
        sta = 0
        end = 7
        for n in range(len(result) // 7):  # 双色球7个号一组,
            if len(result) > end:
                res = res._append(pd.DataFrame(
                    {'开奖日期': str(dates[n]),
                     '双色球': str(result[sta:end])}, index=[n]))#append数据到res
                sta = sta + 7
                end = end + 7
    res.to_excel('E:\mmp\data.xlsx', index=False)#保存到本地excel

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