如何使用Django / Python从RESTful Web服务中使用XML?

时间:2009-04-30 01:13:48

标签: python xml django rest

我应该使用PyXML还是标准库中的内容?

3 个答案:

答案 0 :(得分:10)

ElementTree是标准Python库的一部分。 ElementTree是纯python,而cElementTree是更快的C实现:

# Try to use the C implementation first, falling back to python
try:
    from xml.etree import cElementTree as ElementTree
except ImportError, e:
    from xml.etree import ElementTree

这是一个示例用法,我从RESTful Web服务中使用xml:

def find(*args, **kwargs):
    """Find a book in the collection specified"""

    search_args = [('access_key', api_key),]
    if not is_valid_collection(kwargs['collection']):
        return None
    kwargs.pop('collection')
    for key in kwargs:
        # Only the first keword is honored
        if kwargs[key]:
            search_args.append(('index1', key))
            search_args.append(('value1', kwargs[key]))
            break

    url = urllib.basejoin(api_url, '%s.xml' % 'books')
    data = urllib.urlencode(search_args)
    req = urllib2.urlopen(url, data)
    rdata = []
    chunk = 'xx'
    while chunk:
        chunk = req.read()
        if chunk:
            rdata.append(chunk)
    tree = ElementTree.fromstring(''.join(rdata))
    results = []
    for i, elem in enumerate(tree.getiterator('BookData')):
        results.append(
               {'isbn': elem.get('isbn'),
                'isbn13': elem.get('isbn13'),
                'title': elem.find('Title').text,
                'author': elem.find('AuthorsText').text,
                'publisher': elem.find('PublisherText').text,}
             )
    return results

答案 1 :(得分:3)

我总是喜欢尽可能使用标准库。 ElementTree在pythonistas中是众所周知的,所以你应该能够找到很多例子。它的一部分也在C中进行了优化,所以速度非常快。

http://docs.python.org/library/xml.etree.elementtree.html

答案 2 :(得分:0)

还有BeautifulSoup,它有一些可能更喜欢的API。以下是一个示例,说明如何从Twitter的公共时间线中提取所有推文:

from BeautifulSoup import BeautifulStoneSoup
import urllib

url = urllib.urlopen('http://twitter.com/statuses/public_timeline.xml').read()
favorited = []

soup = BeautifulStoneSoup(url)
statuses = soup.findAll('status')

for status in statuses:
    if status.find('favorited').contents != [u'false']:
        favorited.append(status)