为什么我在 Python 中使用 BeautifulSoup 得到“'ResultSet'没有属性'findAll'”？
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Why am I getting "'ResultSet' has no attribute 'findAll'" using BeautifulSoup in Python?
提问by Alex
So I am learning Python slowly, and am trying to make a simple function that will draw data from the high scores page of an online game. This is someone else's code that i rewrote into one function (which might be the problem), but I am getting this error. Here is the code:
所以我在慢慢地学习Python，并且正在尝试制作一个简单的函数，可以从网络游戏的高分页面中提取数据。这是我重写为一个函数的其他人的代码（这可能是问题所在），但我收到此错误。这是代码：
>>> from urllib2 import urlopen
>>> from BeautifulSoup import BeautifulSoup
>>> def create(el):
source = urlopen(el).read()
soup = BeautifulSoup(source)
get_table = soup.find('table', {'id':'mini_player'})
get_rows = get_table.findAll('tr')
text = ''.join(get_rows.findAll(text=True))
data = text.strip()
return data
>>> create('http://hiscore.runescape.com/hiscorepersonal.ws?user1=bigdrizzle13')
Traceback (most recent call last):
File "<pyshell#18>", line 1, in <module>
create('http://hiscore.runescape.com/hiscorepersonal.ws?user1=bigdrizzle13')
File "<pyshell#17>", line 6, in create
text = ''.join(get_rows.findAll(text=True))
AttributeError: 'ResultSet' object has no attribute 'findAll'
Thanks in advance.
提前致谢。
回答by mechanical_meat
Wow. Triptych provided a greatanswerto a related question.
哇。Triptych 为相关问题提供了很好的答案。
We can see, from BeautifulSoup's source code, that ResultSetsubclasses list.
我们可以看到，从BeautifulSoup的源代码，该ResultSet子类list。
In your example, get_rowsis an instance of BS's ResultSetclass,
and since BS's ResultSetsubclasses list, that means get_rows is a list.
在您的示例中，get_rows是 BSResultSet类的一个实例，
并且由于 BS 的ResultSetsubclasses list，这意味着get_rows 是一个 list。
get_rows, as an instance of ResultSet, does nothave a findAllmethod implemented; hence your error.
What Triptych has done differently is to iterateover that list.
Triptych's method works because the items in the get_rowslist are instances of BS's Tag class; which has a findAllmethod.
get_rows作为实例ResultSet，也没有有findAll方法来实现; 因此你的错误。
Triptych 所做的不同之处在于迭代该列表。
Triptych 的方法有效，因为get_rows列表中的项目是 BS 的 Tag 类的实例；其中有一个findAll方法。
So, to fix your code, you could replace the last three lines of your createmethod with something like this:
因此，要修复您的代码，您可以将方法的最后三行替换为create以下内容：
for row in get_rows:
text = ''.join(row.findAll(text=True))
data = text.strip()
print data
Note to Leonard Richardson: in no way do I intend to demean the quality of your work by referring to it as BS ;-)
伦纳德·理查森 (Leonard Richardson) 的注意事项：我绝不打算通过将其称为 BS 来贬低您的工作质量；-)
