Parsing web page in python using Beautiful Soup

问题

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

there's sth like this:

INFORMACJE O FILMIE
Tytuł............................................: La mer à boireOcena.............................................: IMDB - 6.3/10 (24)Produkcja.........................................: FrancjaGatunek...........................................: DramatCzas trwania......................................: 98 min.Premiera..........................................: 22.02.2012 - ŚwiatReżyseria........................................: Jacques MaillotScenariusz........................................: Pierre Chosson, Jacques MaillotAktorzy...........................................: Daniel Auteuil, Maud Wyler, Yann Trégouët, Alain Beigel

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"]]

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!

My code:

    # -*- 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!")

回答1:

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)

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>

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>]

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
]

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
]

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'

The : string can be removed with lstrip():

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

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 Tr&eacute;gou&euml;t, Alain Beigel'),
 (u'Wi\u0119cej na', u':'),
 (u'Trailer', u':Obejrzyj zwiastun')]

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

回答2:

This will get you the List You want you'll have to write some code to get rid of the trailing '....'s and to convert the character strings.

    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)
LIST = []
for p in soup.findAll('p'):
    s = p.find('span',{ "class" : 'i' })
    t = p.find('span',{ "class" : 'vi' })
    if s and t:
        p_list = [s.string,t.string]
        LIST.append(p_list)

except urllib2.HTTPError : print("HTTPERROR!") except urllib2.URLError : print("URLERROR!")

来源：https://stackoverflow.com/questions/11234614/parsing-web-page-in-python-using-beautiful-soup

标签

python

beautifulsoup

urllib