[已解决]python爬虫豆瓣新人求助

苏执

from bs4 import BeautifulSoup     #网页解析，获取数据
import urllib.request,urllib.error      #制定URL，获取网页数据

def main():
    baseurl = "https://movie.douban.com/top250?start="
    #1.爬取网页
    datalist = getData(baseurl)
    savepath = "豆瓣电影Top250.xls"
    #3.保存数据
    saveData(savepath)
    askUPL("https://movie.douban.com/top250?start=")

#爬取网页
def getData(baseurl):
    datalist = []
    for i in range(0,10):
        url = baseurl+str(i*25)
        html = askUPL(url)
        #2.逐一解析数据
    return datalist

#得到指定一个URL的网页内容
def askURL(url):
    head = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36 Edg/88.0.705.68"
    }
    request = urllib.request.Request(headers = head)
    html = ""
    try:
        response = urllib.request.urlopen(request)
        html = response.read().decode("utf-8")
        print(html)
    except urllib.error.URLError as e:
        if hasattr(e, "code"):
            print(e.code)
        if hasattr(e, "reason"):
            print(e.reason)
    return html

    # 保存数据
def saveData(savepath):
    print("save....")

if __name__ == "__main__":
    main()


为什么一直运行不出来啊？一直显示这个
D:\douban\venv\Scripts\python.exe D:/douban/venv/spider.py
Traceback (most recent call last):
  File "D:/douban/venv/spider.py", line 51, in <module>
    main()
  File "D:/douban/venv/spider.py", line 13, in main
    datalist = getData(baseurl)
  File "D:/douban/venv/spider.py", line 24, in getData
    html = askUPL(url)
NameError: name 'askUPL' is not defined

最佳答案

月排行榜 / 总排行榜

YunGuo

2021-2-19 00:34:48

html = askUPL(url)

这里错了一个字母，也就是报错的第24行代码，你定义的函数名是askURL，打成了askUPL

跳转到最佳答案楼层

Cool_Breeze

ameError: name 'askUPL' is not defined
为什么askUPL未声明呢？
是不是顺序的问题？

YunGuo

html = askUPL(url)

这里错了一个字母，也就是报错的第24行代码，你定义的函数名是askURL，打成了askUPL