"findAll"与"findAll"之间的区别和"find_all"在BeautifulSoup中 [英] Difference between "findAll" and "find_all" in BeautifulSoup

问题描述

我想用Python解析HTML文件，而我正在使用的模块是BeautifulSoup.

I would like to parse an HTML file with Python, and the module I am using is BeautifulSoup.

据说功能find_all与findAll相同.我已经尝试过它们两个，但我相信它们是不同的:

It is said that the function find_all is the same as findAll. I've tried both of them, but I believe they are different:

import urllib, urllib2, cookielib
from BeautifulSoup import *
site = "http://share.dmhy.org/topics/list?keyword=TARI+TARI+team_id%3A407"

rqstr = urllib2.Request(site)
rq = urllib2.urlopen(rqstr)
fchData = rq.read()

soup = BeautifulSoup(fchData)

t = soup.findAll('tr')

有人可以告诉我区别吗?

Can anyone tell me the difference?

推荐答案

在BeautifulSoup版本4中，方法完全相同.混合大小写的版本(findAll，findAllNext，nextSibling等)都已重命名为符合方法名称.

In BeautifulSoup version 4, the methods are exactly the same; the mixed-case versions (findAll, findAllNext, nextSibling, etc.) have all been renamed to conform to the Python style guide, but the old names are still available to make porting easier. See Method Names for a full list.

在新代码中，您应该使用小写版本，例如find_all等.

In new code, you should use the lowercase versions, so find_all, etc.

但是，在您的示例中，您使用的是BeautifulSoup 版本3 (自2012年3月起停产，如果可以提供帮助，请不要使用它)，其中只有可用.未知的属性名称(例如.find_all，仅在BeautifulSoup 4中可用)被视为使用该名称搜索标签.您的文档中没有<find_all>标记，因此将为此返回None.

In your example however, you are using BeautifulSoup version 3 (discontinued since March 2012, don't use it if you can help it), where only findAll() is available. Unknown attribute names (such as .find_all, which only is available in BeautifulSoup 4) are treated as if you are searching for a tag by that name. There is no <find_all> tag in your document, so None is returned for that.

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