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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 _process_features(self, limit=None):
 """ This module provides information for the intrinsic and extrinsic genotype features of zebrafish. All items here are 'alterations', and are therefore instances. sequence alteration ID, SO type, abbreviation, and relationship to the affected gene, with the gene's ID, symbol, and SO type (gene/pseudogene). Triples created: <gene id> a class: :param limit: :return: """

        if self.test_mode:
            graph = self.testgraph
        else:
            graph = self.graph
        model = Model(graph)
        LOG.info("Processing features")
        line_counter = 0
        geno = Genotype(graph)
        raw = '/'.join((self.rawdir, self.files['features']['file']))
        with open(raw, 'r', encoding="iso-8859-1") as csvfile:
            filereader = csv.reader(csvfile, delimiter='\t', quotechar='\"')
            for row in filereader:
                line_counter += 1
                (genomic_feature_id, feature_so_id,
                 genomic_feature_abbreviation, genomic_feature_name,
                 genomic_feature_type, mutagen, mutagee, construct_id,
                 construct_name, construct_so_id, talen_crispr_id,
                 talen_crispr_nam
                 # , empty
                ) = row

                if self.test_mode and (
                        genomic_feature_id not in self.test_ids['allele']):
                    continue

                genomic_feature_id = 'ZFIN:' + genomic_feature_id.strip()
                model.addIndividualToGraph(
                    genomic_feature_id, genomic_feature_name, feature_so_id)

                model.addSynonym(
                    genomic_feature_id, genomic_feature_abbreviation)
                if construct_id is not None and construct_id != '':
                    construct_id = 'ZFIN:' + construct_id.strip()
                    geno.addConstruct(
                        construct_id, construct_name, construct_so_id)
                    geno.addSequenceDerivesFrom(
                        genomic_feature_id, construct_id)

                # Note, we don't really care about how the variant was derived.
                # so we skip that.

                # add to the id-label map
                self.id_label_map[
                    genomic_feature_id] = genomic_feature_abbreviation
                self.id_label_map[construct_id] = construct_name

                if not self.test_mode and limit is not None and line_counter > limit:
                    break

        LOG.info("Done with features")
        return