docs: def get_gene_pathways(self, gene_name=None, gene_symbol=None, gene_id=None, pathway_id=None,
                            pathway_name=None, limit=None, as_df=False):
          """Get gene pathway link
          
          :param bool as_df: if set to True result returns as `pandas.DataFrame`
          :param str gene_name: gene name 
          :param str gene_symbol: gene symbol
          :param int gene_id: NCBI Gene identifier
          :param pathway_id: 
          :param str pathway_name: pathway name
          :param int limit: maximum number of results
          :return: list of :class:`pyctd.manager.database.models.GenePathway` objects
  
          .. seealso::
              
              :class:`pyctd.manager.models.GenePathway`
  
              which is linked to:
              :class:`pyctd.manager.models.Gene`
              :class:`pyctd.manager.models.Pathway`
          """
          q = self.session.query(models.GenePathway)
          q = self._join_gene(q, gene_name=gene_name, gene_symbol=gene_symbol, gene_id=gene_id)
          q = self._join_pathway(q, pathway_id=pathway_id, pathway_name=pathway_name)
  
          return self._limit_and_df(q, limit, as_df)