遇到list index out of range的解决办法
#-*- 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) #获取当前时间
data.append(Acttime)
tempAct=re.findall(findtempAct,item) #获取当前气温
data.append(tempAct)
humAct=re.findall(findhumAct,item) #获取当前湿度
data.append(humAct)
winddirAct=re.findall(findwinddirAct,item) #获取当前风向
data.append(winddirAct)
windclassAct=re.findall(findwindclassAct,item) #获取当前风力级别
data.append(windclassAct)
inqDay=re.findall(findinqDay,item) #获取白天天气种类
data.append(inqDay)
tempDay=re.findall(findtempDay,item) #获取白天气温
data.append(tempDay)
winddirDay=re.findall(findwinddirDay,item) #获取白天风向
data.append(winddirDay)
windclassDay=re.findall(findwindclassDay,item) #获取白天风力级别
data.append(windclassDay)
sunriTime=re.findall(findsunriTime,item) #获取日出时间
data.append(sunriTime)
inqNight=re.findall(findinqNight,item) #获取夜间天气种类
data.append(inqNight)
tempNight=re.findall(findtempNight,item) #获取夜间气温
data.append(tempNight)
winddirNight=re.findall(findwinddirNight,item) #获取夜间风向
data.append(winddirNight)
windclassNight=re.findall(findwindclassNight,item) #获取夜间风力级别
data.append(windclassNight)
sunsetTime=re.findall(findsunsetTime,item) #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)
IndexError: list index out of range
------------------------------------
求助求助求助求助{:10_266:} winddirDay=re.findall(findwinddirDay,item) 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。
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