用python来爬取中国天气网北京，上海，成都8-15天的天气

2 爬取北京，上海，成都的天气

      

from bs4 import BeautifulSoup   
import random
import requests 
import socket 
import time
import http.client 
import csv

def get_html(url,data=None):
    """
    模拟浏览器来获取网页的html代码
    """
    header={
        'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
        'Accept-Encoding': 'gzip, deflate, sdch',
        'Accept-Language': 'zh-CN,zh;q=0.8',
        'Connection': 'keep-alive',
        'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.235'
    }
    
    timeout=random.choice(range(80,180))
    while True:
        try:
            rep=requests.get(url,headers=header,timeout=timeout)
            rep.encoding="utf-8"
            break
        except socket.timeout as e:
            print("3:",e)
            time.sleep(random.choice(range(8,15)))

        except socket.error as e:
            print("4:",e)
            time.sleep(random.choice(range(20,60)))
        except http.client.BadStatusLine as e:
            print("5:",e)
            time.sleep(random.choice(range(30,80)))

        except http.client.IncompleteRead as e:
            print("6:",e)
            time.sleep(random.choice(range(5,15)))

    return rep.text

def get_data(html_txt):
    final=[]
    bs=BeautifulSoup(html_txt,"html.parser")   
    body=bs.body   
    data=body.find("div",{"id":"15d"},{"class":"c15d"}) 
    ul=data.find("ul") 
    li=ul.find_all("li")   

    for day in li:  
        temp=[]
        date=day.find("span",{"class":"time"}).string  
        temp.append(date)   
        inf=day.find("span",{"class":"wea"}).string  
        temp.append(inf)
        wind = day.find("span",{"class":"wind"}).string
        temp.append(wind)
        wind1 = day.find("span",{"class":"wind1"}).string
        temp.append(wind1)
        temperature = day.find("em").string
        temp.append(temperature)
        
        final.append(temp)   

    return final


def get_url():
    city={
    "北京":"101010100",
    "上海":"101020100",
    "成都":"101190401",
        }
    for k in city:
        print(k)
    city_name=input("请输入你要查询的城市名字：")
    city_num=city[city_name]
    weather_url="http://www.weather.com.cn/weather15d/%s.shtml"%city_num
    return weather_url

if __name__=="__main__":
    # url="http://www.weather.com.cn/weather/101190401.shtml"
    while(1):
        url=get_url()
        html=get_html(url)
        result=get_data(html)
        for i in result:
            print(i)