Python 错误：“NoneType”对象没有属性“find_all”
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Python error: 'NoneType' object has no attribute 'find_all'
提问by user3554610
I'm adapting a web scraping program from, http://danielfrg.com/blog/2013/04/01/nba-scraping-data/#disqus_thread, to scrape ESPN for baseball data into a CSV. However when I run the second piece of code to write a csv of games I get the 'NoneType' object has no attribute 'find_all' error, from the following section of code
我正在改编来自http://danielfrg.com/blog/2013/04/01/nba-scraping-data/#disqus_thread的网络抓取程序，以将 ESPN 的棒球数据抓取到 CSV 中。但是，当我运行第二段代码来编写一个 csv 游戏时，我从以下代码部分得到“NoneType”对象没有属性“find_all”错误
for index, row in teams.iterrows():
_team, url = row['team'], row['url']
r = requests.get(BASE_URL.format(row['prefix_1'], year, row['prefix_2']))
table = BeautifulSoup(r.text).table
for row in table.find_all("tr")[1:]: # Remove header
columns = row.find_all('td')
try:
_home = True if columns[1].li.text == 'vs' else False
_other_team = columns[1].find_all('a')[1].text
_score = columns[2].a.text.split(' ')[0].split('-')
_won = True if columns[2].span.text == 'W' else False
match_id.append(columns[2].a['href'].split('?id=')[1])
home_team.append(_team if _home else _other_team)
visit_team.append(_team if not _home else _other_team)
d = datetime.strptime(columns[0].text, '%a, %b %d')
dates.append(date(year, d.month, d.day))
I can post the whole program but this is the piece of code the compiler reads the error for.
我可以发布整个程序，但这是编译器读取错误的代码段。
The full error text is
完整的错误文本是
Traceback (most recent call last):
File "C:\Python27\Project Files\Game Parser.py", line 23, in <module>
for row in table.find_all("tr")[1:]: # Remove header
AttributeError: 'NoneType' object has no attribute 'find_all'
Any help on how to get this code running would be greatly appreciated.
任何有关如何运行此代码的帮助将不胜感激。
采纳答案by shaktimaan
The error means that the tablevariable that you are building by doing:
该错误意味着table您正在通过执行以下操作来构建变量：
table = BeautifulSoup(r.text).table
is returning None. And for row in table.find_all("tr")[1:]:on a Noneis throwing the error.
正在返回None。并且for row in table.find_all("tr")[1:]:在 aNone上抛出错误。
You can check if the urlin question has a table in the way you are trying to access it. You can do this by printing out the urlconstructed by this statement:
您可以检查有url问题的表格是否以您尝试访问的方式存在。您可以通过打印出url此语句构造的来实现此目的：
BASE_URL.format(row['prefix_1'], year, row['prefix_2'])
and then going to this url in your browser to check if it has the table of your interest.
然后在浏览器中访问此 url 以检查它是否包含您感兴趣的表格。
