code: def get_all_tags(self, filters=None):
          
          params = {}
          if filters:
              self.build_filter_params(params, filters)
          return self.get_list('DescribeTags', params,
                               [('item', Tag)], verb='POST')
docs: Retrieve all the metadata tags associated with your account.
  
          :type filters: dict
          :param filters: Optional filters that can be used to limit
                          the results returned.  Filters are provided
                          in the form of a dictionary consisting of
                          filter names as the key and filter values
                          as the value.  The set of allowable filter
                          names/values is dependent on the request
                          being performed.  Check the EC2 API guide
                          for details.
  
          :rtype: dict
          :return: A dictionary containing metadata tags