Pandas.read html() 获取静态网页表格数据

来自CloudWiki
跳转至: 导航搜索

需求

获取 http://www.air-level.com/air/xian/ 的空气质量指数表格数据。

代码

import pandas as pd
df = pd.read_html("http://www.air-level.com/air/xian/", encoding='utf-8', header=0)[0]
df.to_excel('xian_tianqi.xlsx', index=False)

最后

read_html() 仅支持静态网页解析。你可以通过其他方法获取动态页面加载后response.text 传入 read_html() 再获取表格数据。

案例:爬取微博热搜

# -*- coding: UTF-8 -*-
"""
@File    :微博热搜榜.py
@Author  :叶庭云
@Date    :2020/9/18 15:01
"""
import schedule
import pandas as pd
from datetime import datetime
import logging

logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s: %(message)s')
count = 0


def get_content():
    global count   # 全局变量count
    print('----------- 正在爬取数据 -------------')
    url = 'https://s.weibo.com/top/summary?cate=realtimehot&sudaref=s.weibo.com&display=0&retcode=6102'
    df = pd.read_html(url)[0][1:11][['序号', '关键词']]   # 获取热搜前10
    time_ = datetime.now().strftime("%Y/%m/%d %H:%M")     # 获取当前时间
    df['序号'] = df['序号'].apply(int)
    df['热度'] = df['关键词'].str.split('  ', expand=True)[1]
    df['关键词'] = df['关键词'].str.split('  ', expand=True)[0]
    df['时间'] = [time_] * len(df['序号'])
    if count == 0:
        df.to_csv('datas.csv', mode='a+', index=False)
        count += 1
    else:
        df.to_csv('datas.csv', mode='a+', index=False, header=False)


# 定时爬虫
schedule.every(1).minutes.do(get_content)

while True:
    schedule.run_pending()