“findAll"和“findAll"之间的区别和“find_all"在美汤 [英] Difference between "findAll" and "find_all" in BeautifulSoup

问题描述

我想用Python解析一个HTML文件，我使用的模块是BeautifulSoup.

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

据说函数find_all和findAll是一样的.我已经尝试过它们，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')

谁能告诉我有什么区别?

Can anyone tell me the difference?

推荐答案

在 BeautifulSoup 版本 4 中，方法完全相同；大小写混合版本(findAll、findAllNext、nextSibling 等)都已重命名以符合 Python 风格指南，但旧名称仍然可用，以便于移植.有关完整列表，请参阅方法名称.

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，你应该使用小写版本，所以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 第 3 版(自 2012 年 3 月起停产，不要如果可以帮助它)，其中只有 findAll() 可用.未知的属性名称(例如 .find_all，仅在 BeautifulSoup 4 中可用)被视为您正在按该名称搜索标签.您的文档中没有 <find_all> 标记，因此会为此返回 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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