ValueError:索引79处不支持的格式字符'a'(0x61)

时间:2013-10-19 04:46:10

标签: python python-2.7 beautifulsoup screen-scraping

我正在尝试使用漂亮的soup4和python从网站上抓取数据。这是我的代码

from bs4 import BeautifulSoup
import urllib2
i = 0
for i in xrange(0,38):
    page=urllib2.urlopen("http://www.sfap.org/klsfaprep_search?page={}&type=1&strname=&loc=&op=Lancer%20la%20recherche&form_build_id=form-72a297de309517ed5a2c28af7ed15208&form_id=klsfaprep_search_form" %i) 
    soup = BeautifulSoup(page.read())
    for eachuniversity in soup.findAll('div',{'class':'field-item odd'}):
        print ''.join(eachuniversity.findAll(text=True)).encode('utf-8')
    print ',\n'
i= i+ 1

我认为问题出在我提供的URL和增量语句中。我能够逐页搜索。但只有当我给出xrange时。

1 个答案:

答案 0 :(得分:3)

ValueError

的原因

您正在将{}格式与%格式混合。

>>> '{}%20la' % 1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: unsupported format character 'a' (0x61) at index 6
>>> '{}%20la'.format(1)
'1%20la'

我建议您使用{}格式,因为在网址中,有多个%

page=urllib2.urlopen("http://www.sfap.org/klsfaprep_search?page={}&type=1&strname=&loc=&op=Lancer%20la%20recherche&form_build_id=form-72a297de309517ed5a2c28af7ed15208&form_id=klsfaprep_search_form".format(i))

完整代码

您不需要i = 0i = i + 1,因为for i in xrange(0,38)会照顾它。

import urllib2 # Import standard library module first. (PEP-8)

from bs4 import BeautifulSoup

for i in xrange(0,38):
    page = urllib2.urlopen("http://www.sfap.org/klsfaprep_search?page={}&type=1&strname=&loc=&op=Lancer%20la%20recherche&form_build_id=form-72a297de309517ed5a2c28af7ed15208&form_id=klsfaprep_search_form" .format(i))
    soup = BeautifulSoup(page.read())
    for eachuniversity in soup.findAll('div',{'class':'field-item odd'}):
        print ''.join(eachuniversity.findAll(text=True)).encode('utf-8')
    print ',\n'