使用Beautiful Soup在python中解析网页 [英] Parsing web page in python using Beautiful Soup

问题描述

我很难从网站上获取数据.网站资源在这里:

I have some troubles with getting the data from the website. The website source is here:

view-source:http://release24.pl/wpis/23714/%22La+mer+a+boire%22+%282011%29+FRENCH.DVDRip.XviD-AYMO

有这样的东西:

INFORMACJE O FILMIE

Tytuł....................................... .....:La meràboire

INFORMACJE O FILMIE

Tytuł............................................: La mer à boire

我想从该网站获取数据以获取Python字符串列表:

And I want to get the data from this website to have a Python list of strings:

[[Tytuł, "La mer à boire"]
[Ocena, "IMDB - 6.3/10 (24)"]
[Produkcja, Francja]
[Gatunek, Dramat]
[Czas trwania, 98 min.]
[Premiera, "22.02.2012 - Świat"]
[Reżyseria, "Jacques Maillot"]
[Scenariusz, "Pierre Chosson, Jacques Maillot"]
[Aktorzy, "Daniel Auteuil, Maud Wyler, Yann Trégouët, Alain Beigel"]]

我使用BeautifulSoup编写了一些代码，但我无法再进一步了，我只是不知道从网站源中获取其余信息以及如何将其转换为字符串... 请帮忙！

I wrote some code using BeautifulSoup but I cant go any further, I just don't know what to get the rest from the website source and how to convert is to string ... Please, help!

我的代码:

    # -*- coding: utf-8 -*-
#!/usr/bin/env python

import urllib2
from bs4 import BeautifulSoup

try :
    web_page = urllib2.urlopen("http://release24.pl/wpis/23714/%22La+mer+a+boire%22+%282011%29+FRENCH.DVDRip.XviD-AYMO").read()
    soup = BeautifulSoup(web_page)
    c = soup.find('span', {'class':'vi'}).contents
    print(c)
except urllib2.HTTPError :
    print("HTTPERROR!")
except urllib2.URLError :
    print("URLERROR!")

推荐答案

使用BeautifulSoup的秘密在于找到HTML文档的隐藏模式.例如，您的循环

The secret of using BeautifulSoup is to find the hidden patterns of your HTML document. For example, your loop

for ul in soup.findAll('p') :
    print(ul)

的方向正确，但是它将返回所有段落，不仅是您要查找的段落.但是，您要查找的段落具有类i的有用属性.在这些段落中，可以找到两个跨度，一个跨度为i类，另一个跨度为vi类.我们很幸运，因为这些跨度包含您要查找的数据:

is in the right direction, but it will return all paragraphs, not only the ones you are looking for. The paragraphs you are looking for, however, have the helpful property of having a class i. Inside these paragraphs one can find two spans, one with the class i and another with the class vi. We are lucky because those spans contains the data you are looking for:

<p class="i">
    <span class="i">Tytuł............................................</span>
    <span class="vi">: La mer à boire</span>
</p>

因此，首先获取具有给定类的所有段落:

So, first get all the paragraphs with the given class:

>>> ps = soup.findAll('p', {'class': 'i'})
>>> ps
[<p class="i"><span class="i">Tytuł... <LOTS OF STUFF> ...pan></p>]

现在，使用列表理解，我们可以生成一个配对列表，其中每个配对包含该段的第一个和第二个跨度:

Now, using list comprehensions, we can generate a list of pairs, where each pair contains the first and the second span from the paragraph:

>>> spans = [(p.find('span', {'class': 'i'}), p.find('span', {'class': 'vi'})) for p in ps]
>>> spans
[(<span class="i">Tyt... ...</span>, <span class="vi">: La mer à boire</span>), 
 (<span class="i">Ocena... ...</span>, <span class="vi">: IMDB - 6.3/10 (24)</span>),
 (<span class="i">Produkcja.. ...</span>, <span class="vi">: Francja</span>),
 # and so on
]

现在我们有了跨度，我们可以从中获取文本:

Now that we have the spans, we can get the texts from them:

>>> texts = [(span_i.text, span_vi.text) for span_i, span_vi in spans]
>>> texts
[(u'Tytu\u0142............................................', u': La mer \xe0 boire'),
 (u'Ocena.............................................', u': IMDB - 6.3/10 (24)'),
 (u'Produkcja.........................................', u': Francja'), 
  # and so on
]

这些文本仍然不行，但是很容易更正它们.要删除第一个点，我们可以使用 rstrip() :

Those texts are not ok still, but it is easy to correct them. To remove the dots from the first one, we can use rstrip():

>>> u'Produkcja.........................................'.rstrip('.')
u'Produkcja'

可以使用 lstrip() :

>>> u': Francja'.lstrip(': ')
u'Francja'

要将其应用于所有内容，我们只需要另一个列表理解即可:

To apply it to all content, we just need another list comprehension:

>>> result = [(text_i.rstrip('.'), text_vi.replace(': ', '')) for text_i, text_vi in texts]
>>> result
[(u'Tytu\u0142', u'La mer \xe0 boire'),
 (u'Ocena', u'IMDB - 6.3/10 (24)'),
 (u'Produkcja', u'Francja'),
 (u'Gatunek', u'Dramat'),
 (u'Czas trwania', u'98 min.'),
 (u'Premiera', u'22.02.2012 - \u015awiat'),
 (u'Re\u017cyseria', u'Jacques Maillot'),
 (u'Scenariusz', u'Pierre Chosson, Jacques Maillot'),
 (u'Aktorzy', u'Daniel Auteuil, Maud Wyler, Yann Trégouët, Alain Beigel'),
 (u'Wi\u0119cej na', u':'),
 (u'Trailer', u':Obejrzyj zwiastun')]

就是这样.我希望这个循序渐进的示例可以使您更清楚地使用BeautifulSoup.

And that is it. I hope this step-by-step example can make the use of BeautifulSoup clearer for you.

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