遇到list index out of range的解决办法

怡宁2131

#-*- codeing=utf-8 -*-
import re
from bs4 import BeautifulSoup
import urllib.request
import region       #此库为地区编码(有芒市，昆明，保山)


def main():
    baseurl="http://www.weather.com.cn/"
    datalist=getData(baseurl)
    print(datalist)
    

#设置获取规则(规则相同的同一归为Allrule1和Allrule2)
Allrule1=re.compile(r'<span>(.*)</span>')       
Allrule2=re.compile(r'<em>(.*)</em>')
findwindclassAct=Allrule2
findtempAct=Allrule1
findActtime=Allrule1
findhumAct=Allrule2
findwinddirAct=Allrule1

findinqDay=re.compile(r'<p class="wea" title="(.*)">(.*)</p>')
findtempDay=Allrule1
findwinddirDay=re.compile(r'<span class title="(.*)">')
findwindclassDay=re.compile(r'<(.*)</span>')
findsunriTime=Allrule1

findinqNight=re.compile(r'<p class="wea" title="(.*)">(.*)</p>')
findtempNight=Allrule1
findwinddirNight=re.compile(r'<span class title="(.*)">')
findwindclassNight=re.compile(r'<(.*)</span>')
sunsetTime=Allrule1



#爬取网页
def getData(baseurl):
    regionnum=region.selectRegion()
    url=baseurl+r"weather1d/"+regionnum+".shtml#around1"
    html=askUrl(url)
    #解析数据
    soup=BeautifulSoup(html,"html.parser")
    for item in soup.find_all('div',class_="t"):
        data=[]
        item=str(item)

        
        Acttime=re.findall(findActtime,item)[0]             #获取当前时间
        data.append(Acttime)                                
        tempAct=re.findall(findtempAct,item)[3]             #获取当前气温
        data.append(tempAct)
        humAct=re.findall(findhumAct,item)[0]               #获取当前湿度
        data.append(humAct)
        winddirAct=re.findall(findwinddirAct,item)[2]       #获取当前风向
        data.append(winddirAct)
        windclassAct=re.findall(findwindclassAct,item)[1]   #获取当前风力级别
        data.append(windclassAct)                           

        inqDay=re.findall(findinqDay,item)[0]               #获取白天天气种类
        data.append(inqDay)
        tempDay=re.findall(findtempDay,item)[5]             #获取白天气温
        data.append(tempDay)
        winddirDay=re.findall(findwinddirDay,item)[0]       #获取白天风向
        data.append(winddirDay)
        windclassDay=re.findall(findwindclassDay,item)[0]   #获取白天风力级别
        data.append(windclassDay)
        sunriTime=re.findall(findsunriTime,item)[6]         #获取日出时间
        data.append(sunriTime)

        inqNight=re.findall(findinqNight,item)[1]           #获取夜间天气种类
        data.append(inqNight)
        tempNight=re.findall(findtempNight,item)[7]         #获取夜间气温
        data.append(tempNight)
        winddirNight=re.findall(findwinddirNight,item)[1]   #获取夜间风向
        data.append(winddirNight)
        windclassNight=re.findall(findwindclassNight,item)[1] #获取夜间风力级别
        data.append(windclassNight)
        sunsetTime=re.findall(findsunsetTime,item)[8]       #获取日落时间
        data.append(sunsetTime)

        
    return data


"""
def printData():
    data=getData(baseurl)
    print(data)
"""    


#获取网页
def askUrl(url):
    head={
        "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.54 Safari/537.36"
    }
    req=urllib.request.Request(url,headers=head)
    html=""
    try:
        resp=urllib.request.urlopen(req)
        html=resp.read().decode("utf-8")

    except urllib.error.URLError as e:
        if hasattr(e,"code"):
            print(e.code)
        if hasattr(e,"reason"):
            print(e.reason)
    
    return html



if __name__=="__main__":
    main()

------------------------------------
报错信息为:
Traceback (most recent call last):
  File "F:\python_file\spider_wether.py", line 115, in <module>
    main()
  File "F:\python_file\spider_wether.py", line 10, in main
    data=getData(baseurl)
  File "F:\python_file\spider_wether.py", line 63, in getData
    winddirDay=re.findall(findwinddirDay,item)[0]
IndexError: list index out of range
------------------------------------
求助求助求助求助

suchocolate

winddirDay=re.findall(findwinddirDay,item)[0] 这一行没有找到数据，所以报错了，查查re语法，一般都用非贪婪匹配的。