def load_exons(self, exons, genes=None, build='37'):
        """Create exon objects and insert them into the database
        
        Args:
            exons(iterable(dict))
        """
        genes = genes or self.ensembl_genes(build)
        for exon in exons:
            exon_obj = build_exon(exon, genes)
            if not exon_obj:
                continue
            
            res = self.exon_collection.insert_one(exon_obj)
Create exon objects and insert them into the database
        
        Args:
            exons(iterable(dict))