def get_clusters(self, variant_id):
        """Search what clusters a variant belongs to
        
        Args:
            variant_id(str): From ID column in vcf
        
        Returns:
            clusters()
        """
        query = {'variant_id':variant_id}
        identities = self.db.identity.find(query)
        return identities
Search what clusters a variant belongs to
        
        Args:
            variant_id(str): From ID column in vcf
        
        Returns:
            clusters()