old_contents: #!/usr/bin/env python
  
  #Copyright (c) 2010 Gerson Minichiello
  #
  #Permission is hereby granted, free of charge, to any person obtaining a copy
  #of this software and associated documentation files (the "Software"), to deal
  #in the Software without restriction, including without limitation the rights
  #to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  #copies of the Software, and to permit persons to whom the Software is
  #furnished to do so, subject to the following conditions:
  #
  #The above copyright notice and this permission notice shall be included in
  #all copies or substantial portions of the Software.
  #
  #THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  #IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  #FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  #AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  #LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  #OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  #THE SOFTWARE.
  
  import rdfadict
  
  OPENGRAPH_NAMESPACES = [
    "http://opengraphprotocol.org/schema",
    "http://opengraphprotocol.org/schema/",
    "http://ogp.me/ns#",
  ]
  
  class PyOpenGraph(object):
     
      def __init__(self, url):
          parser = rdfadict.RdfaParser()
          result = parser.parse_url(url)
          data = result[url]
          self.metadata = self.get_properties(data)
  
      def get_properties(self, data):
          content = {}
          for k, v in data.iteritems():
              for ns in OPENGRAPH_NAMESPACES:
                  if k.startswith(ns) and len(v)>0:
                      content[k.replace(ns, '')] = v[0]
          return content
      
      def __str__(self):
          return self.metadata['title']
  
  if __name__ == '__main__':
      # Usage
      og = PyOpenGraph('http://www.zappos.com/timberland-pro-titan-safety-toe-oxford')
      print og.metadata
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  #Copyright (c) 2010 Gerson Minichiello
  #
  #Permission is hereby granted, free of charge, to any person obtaining a copy
  #of this software and associated documentation files (the "Software"), to deal
  #in the Software without restriction, including without limitation the rights
  #to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  #copies of the Software, and to permit persons to whom the Software is
  #furnished to do so, subject to the following conditions:
  #
  #The above copyright notice and this permission notice shall be included in
  #all copies or substantial portions of the Software.
  #
  #THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  #IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  #FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  #AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  #LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  #OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  #THE SOFTWARE.
  
  import rdfadict
  
  OPENGRAPH_NAMESPACES = [
    "http://opengraphprotocol.org/schema",
    "http://opengraphprotocol.org/schema/",
    "http://ogp.me/ns#",
  ]
  
  class PyOpenGraph(object):
     
      def __init__(self, url=None, xml=None):
          parser = rdfadict.RdfaParser()
          if not xml:
              result = parser.parse_url(url)
          else:
              result = parser.parse_string(xml, url)
          data = result[url]
          self.metadata = self.get_properties(data)
  
      def get_properties(self, data):
          content = {}
          for k, v in data.iteritems():
              for ns in OPENGRAPH_NAMESPACES:
                  if k.startswith(ns) and len(v)>0:
                      content[k.replace(ns, '')] = v[0]
          return content
      
      def __str__(self):
          return self.metadata['title']
  
  if __name__ == '__main__':
      # Usage
      og = PyOpenGraph('http://www.zappos.com/timberland-pro-titan-safety-toe-oxford')
      print og.metadata
  
subject: allow to pass the xml by content instead of url, keeping backward compatibility