Crossin的编程教室

标题: 请大佬们看看是哪里错了，想破头想不出呜呜 [打印本页]

作者: sktt1fakerk 时间: 2020-10-14 10:51
标题: 请大佬们看看是哪里错了，想破头想不出呜呜
#-*- coding:utf-8 -*-
import re
from bs4 import BeautifulSoup
import xlwt
import sqlite3
import urllib.request,urllib.error
import urllib.parse

def main():
gethtml(url = "https://movie.douban.com/top250?start=0")
getdata(baseurl = "https://movie.douban.com/top250?start=0")

# def find_thing():

def gethtml(url):
html = ""
headers = {
      "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36"
}
req = urllib.request.Request(url, headers=headers)
response = urllib.request.urlopen(req)
print(response.read().decode("utf-8"))
# return html

def getdata(baseurl):
datalist = []
for i in range(0,1):
      url = baseurl + str(i*25)
      html = gethtml(url)

      soup = BeautifulSoup(html,"html.parser")
      for item in soup.find_all('div',class_ ="item"):
         datalist.append(item)

if __name__ == '__main__':
main()

Traceback (most recent call last):
  File "C:/Users/11929/PycharmProjects/untitled1/htmlfirst.py", line 47, in <module>
main()
  File "C:/Users/11929/PycharmProjects/untitled1/htmlfirst.py", line 13, in main
getdata(baseurl = "https://movie.douban.com/top250?start=0")
  File "C:/Users/11929/PycharmProjects/untitled1/htmlfirst.py", line 37, in getdata
soup = BeautifulSoup(html,"html.parser")
  File "C:\Users\11929\AppData\Local\Programs\Python\Python36\lib\site-packages\bs4\__init__.py", line 310, in __init__
elif len(markup) <= 256 and (
TypeError: object of type 'NoneType' has no len()

作者: crossin先生 时间: 2020-10-14 16:38
html = gethtml(url)

gethtml没有返回值，所以html是None

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