python 爬取历史天气

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官网：http://lishi.tianqi.com/luozhuangqu/201802.html

# encoding:utf-8

import requests

from bs4 import BeautifulSoup

import pymysql

import pandas as pd

date_list = [x.strftime('%Y%m') for x in list(pd.date_range(start='2016-09', end='2018-09', freq="m"))]

url_str = "http://lishi.tianqi.com/"

# citys = ["苍山", "费县", "河东区", "莒南", "临沭", "兰山市", "罗庄区", "蒙阴", "平邑", "郯城", "沂南", "沂水"]

# city_code = ["cangshan", "feixian", "hedong", "junan", "linshu", "lanshan", "luozhuangqu", "mengyin", "pingyi",

#              "tancheng", "yinan", "yishui"]

city_code = ["yishui"]

urls = []

# url拼接

for city in city_code:

    for date_item in date_list:

        url = url_str + city + "/" + date_item + ".html"

        urls.append(url)

# 数据爬取

for url in urls:

    response = requests.get(url)

    soup = BeautifulSoup(response.text, 'html.parser')

    weather_list = soup.select('div[class="tqtongji2"]')

    for weather in weather_list:

        weather_date = weather.select('a')[0].string.encode('utf-8')

        ul_list = weather.select('ul')

        for ul in ul_list[1:]:

            li_list = ul.select('li')

            tCity = "沂水"

            tDate = li_list[0].string

            tTopTem = li_list[1].string

            tLowTem = li_list[2].string

            tWeather = li_list[3].string

            tWindDir = li_list[4].string

            tWindPower = li_list[5].string

            # 数据库存储

            conn = pymysql.connect(host='localhost', user='root', passwd='', database='weather',

                                   charset='utf8')  # 链接数据库

            cursor = conn.cursor()  # 获得游标

            # 向数据库添加数据的SQL语句

            sql = "insert into mWeather (mCity,mDate,mTopTem,mLowTem,mWeather,mWindDir,mWindPower) values ('%s','%s','%s','%s','%s','%s','%s')" \

                  % (tCity, tDate, tTopTem, tLowTem, tWeather, tWindDir, tWindPower)

            cursor.execute(sql)  # 执行

            conn.commit()  # 提交添加数据的命令

            cursor.close()

            conn.close()

            print(tCity + "  城市  " + tDate + " 数据  -----   爬取成功！")

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