old_contents: import feedparser
  
  
  class Feed(object):
  
      _PARAMS = frozenset([
          'author', 'author_detail', 'authors', 'generator', 'generator_detail',
          'image', 'itunes_explicit', 'language', 'link', 'links', 'publisher',
          'publisher_detail', 'rawvoice_frequency', 'rawvoice_rating', 'rights',
          'rights_detail', 'subtitle', 'subtitle_detail', 'summary',
          'summary_detail', 'sy_updatefrequency', 'sy_updateperiod', 'tags',
          'title', 'title_detail', 'updated', 'updated_parsed'
      ])
  
      def __init__(self, url=None, **kwargs):
          self.url = url
          if url is not None:
              d = feedparser.parse(url)
              feed_obj = d.feed
              self._entries = d.entries
              for key in self._PARAMS:
                  setattr(self, key, feed_obj.feed.pop(key))
                  setattr(self, key, kwargs.get(key))
              self._custom_keys = feed_obj.feed
  
      @property
      def entries(self):
          """
          Iterates through self._entries and yields an Entry object for each
          entry.
  
          :return: Generator of all the Entry objects in this Feed object.
          :rtype:  ``generator``
          """
          for entry in self._entries:
              yield Entry(**entry)
  
  
  class Entry(object):
  
      _PARAMS = frozenset([
          'author', 'author_detail', 'authors', 'comments', 'content',
          'guidislink', 'id', 'itunes_duration', 'itunes_explicit', 'link',
          'links', 'published', 'published_parsed', 'slash_comments', 'subtitle',
          'subtitle_detail', 'summary', 'summary_detail', 'tags', 'title',
          'title_detail', 'wfw_commentrss'
      ])
  
      def __init__(self, **kwargs):
          for key in self._PARAMS:
              setattr(self, key, kwargs.get(key))
  
new_contents: import feedparser
  
  
  class Feed(object):
  
      _PARAMS = frozenset([
          'author', 'author_detail', 'authors', 'generator', 'generator_detail',
          'image', 'itunes_explicit', 'language', 'link', 'links', 'publisher',
          'publisher_detail', 'rawvoice_frequency', 'rawvoice_rating', 'rights',
          'rights_detail', 'subtitle', 'subtitle_detail', 'summary',
          'summary_detail', 'sy_updatefrequency', 'sy_updateperiod', 'tags',
          'title', 'title_detail', 'updated', 'updated_parsed'
      ])
  
      def __init__(self, url=None, **kwargs):
          self.url = url
          if url is not None:
              d = feedparser.parse(url)
              feed_obj = d.feed
              self._entries = d.entries
              for key in self._PARAMS:
                  setattr(self, key, feed_obj.feed.pop(key))
                  setattr(self, key, kwargs.get(key))
              self._custom_keys = feed_obj.feed
  
      @property
      def entries(self):
          """
          Iterates through self._entries and yields an Entry object for each
          entry.
  
          :return: List of all the Entry objects in this Feed object.
          :rtype:  ``list``
          """
          return [Entry(**entry) for entry in self._entries]
  
  
  class Entry(object):
  
      _PARAMS = frozenset([
          'author', 'author_detail', 'authors', 'comments', 'content',
          'guidislink', 'id', 'itunes_duration', 'itunes_explicit', 'link',
          'links', 'published', 'published_parsed', 'slash_comments', 'subtitle',
          'subtitle_detail', 'summary', 'summary_detail', 'tags', 'title',
          'title_detail', 'wfw_commentrss'
      ])
  
      def __init__(self, **kwargs):
          for key in self._PARAMS:
              setattr(self, key, kwargs.get(key))
  
subject: update Feed.entries()