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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def content(self):
    '''
    Plain text content of the page, excluding images, tables, and other data.
    '''

    if not getattr(self, '_content', False):
      query_params = {
        'prop': 'extracts|revisions',
        'explaintext': '',
        'rvprop': 'ids'
      }
      if not getattr(self, 'title', None) is None:
         query_params['titles'] = self.title
      else:
         query_params['pageids'] = self.pageid
      request = _wiki_request(query_params)
      self._content     = request['query']['pages'][self.pageid]['extract']
      self._revision_id = request['query']['pages'][self.pageid]['revisions'][0]['revid']
      self._parent_id   = request['query']['pages'][self.pageid]['revisions'][0]['parentid']

    return self._content