使用Python和BeautifulSoup解析表 [英] Using Python and BeautifulSoup to Parse a Table

问题描述

我试图访​​问与Python和BeautifulSoup一定TD标签的内容。我可以拿到第一td标签符合条件（与find），或全部（带的findAll）。

现在，我可以只使用的findAll，让他们所有，并得到了我想要从他们的内容，但看来似乎是低效率的（即使我把限制在搜索）。反正是有一定要去td标签符合我想要的标准是什么？说第三个，还是10号？

下面是我的code迄今：

 从__future__进口部
从__future__进口UNI code_literals
从__future__进口print_function
从机械化导入浏览器
从BeautifulSoup进口BeautifulSoupBR =浏览器（）
URL =htt​​p://finance.yahoo.com/q/ks?s=goog+Key+Statistics
页= br.open（URL）
HTML = page.read（）
汤= BeautifulSoup（HTML）
TD = soup.findAll（TD，{'类'：'yfnc_tablehead1'}）对于x的范围（LEN（TD））：
    VAR1 = TD [X]
    VAR2 = var1.contents [0]
    打印（VAR2）
 

解决方案

找到和的findAll 是非常灵活的，在<一个href=\"http://www.crummy.com/software/BeautifulSoup/documentation.html#The%20basic%20find%20method%3a%20findAll%28name,%20attrs,%20recursive,%20text,%20limit,%20%2a%2akwargs%29\"相对=nofollow> BeautifulSoup.findAll 文档说

  

5。你可以通过在一个可调用对象
  这需要一个标签对象作为其唯一
  参数，返回一个布尔值。一切
  标记对象的findAll遭遇
  将被传递到该对象，
  如果调用返回true，则标签
  被认为是匹配的。

I am trying to access content in certain td tags with Python and BeautifulSoup. I can either get the first td tag meeting the criteria (with find), or all of them (with findAll).

Now, I could just use findAll, get them all, and get the content I want out of them, but that seems like it is inefficient (even if I put limits on the search). Is there anyway to go to a certain td tag meeting the criteria I want? Say the third, or the 10th?

Here's my code so far:

from __future__ import division
from __future__ import unicode_literals
from __future__ import print_function
from mechanize import Browser
from BeautifulSoup import BeautifulSoup

br = Browser()
url = "http://finance.yahoo.com/q/ks?s=goog+Key+Statistics"
page = br.open(url)
html = page.read()
soup = BeautifulSoup(html)
td = soup.findAll("td", {'class': 'yfnc_tablehead1'})

for x in range(len(td)):
    var1 = td[x]
    var2 = var1.contents[0]
    print(var2)

解决方案

find and findAll are very flexible, the BeautifulSoup.findAll docs say

5. You can pass in a callable object which takes a Tag object as its only argument, and returns a boolean. Every Tag object that findAll encounters will be passed into this object, and if the call returns True then the tag is considered to match.

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