| ################################################################################ |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| ################################################################################ |
| import os |
| from typing import List |
| |
| from pyflink.common import Row |
| from pyflink.table import DataTypes, Table |
| |
| from pyflink.ml.lib.feature.bucketizer import Bucketizer |
| from pyflink.ml.tests.test_utils import PyFlinkMLTestCase |
| |
| |
| class BucketizerTest(PyFlinkMLTestCase): |
| def setUp(self): |
| super(BucketizerTest, self).setUp() |
| self.input_table = self.t_env.from_elements([ |
| (1, -0.5, 0.0, 1.0), |
| (2, float('-inf'), 1.0, float('inf')), |
| (3, float('nan'), -0.5, -0.5)], |
| DataTypes.ROW( |
| [DataTypes.FIELD("id", DataTypes.INT()), |
| DataTypes.FIELD("f1", DataTypes.DOUBLE()), |
| DataTypes.FIELD("f2", DataTypes.DOUBLE()), |
| DataTypes.FIELD("f3", DataTypes.DOUBLE())])) |
| self.splits_array = ((-0.5, 0.0, 0.5), |
| (-1.0, 0.0, 2.0), |
| (float('-inf'), 10.0, float('inf'))) |
| self.expected_keep_result = [Row(1, 0, 1, 0), Row(2, 2, 1, 1), Row(3, 2, 0, 0)] |
| self.expected_skip_result = [Row(1, 0, 1, 0)] |
| |
| def test_param(self): |
| bucketizer = Bucketizer() |
| self.assertEqual("error", bucketizer.handle_invalid) |
| |
| bucketizer.set_input_cols("f1", "f2", "f3") \ |
| .set_output_cols("o1", "o2", "o3") \ |
| .set_handle_invalid("skip") \ |
| .set_splits_array(self.splits_array) |
| |
| self.assertEqual(('f1', 'f2', 'f3'), bucketizer.input_cols) |
| self.assertEqual(('o1', 'o2', 'o3'), bucketizer.output_cols) |
| self.assertEqual('skip', bucketizer.handle_invalid) |
| |
| self.assertEqual(self.splits_array, bucketizer.get_split_array()) |
| |
| def test_output_schema(self): |
| bucketizer = Bucketizer() |
| bucketizer.set_input_cols('f1', 'f2', 'f3') \ |
| .set_output_cols('o1', 'o2', 'o3') \ |
| .set_handle_invalid('skip') \ |
| .set_splits_array(self.splits_array) |
| |
| output = bucketizer.transform(self.input_table)[0] |
| self.assertEqual( |
| ['id', 'f1', 'f2', 'f3', 'o1', 'o2', 'o3'], |
| output.get_schema().get_field_names()) |
| |
| def test_transform(self): |
| bucketizer = Bucketizer() \ |
| .set_input_cols('f1', 'f2', 'f3') \ |
| .set_output_cols('o1', 'o2', 'o3') \ |
| .set_splits_array(self.splits_array) |
| |
| # Tests skip. |
| bucketizer.set_handle_invalid('skip') |
| output = bucketizer.transform(self.input_table)[0] |
| field_names = output.get_schema().get_field_names() |
| self.verify_output_result( |
| output, bucketizer.get_output_cols(), field_names, self.expected_skip_result) |
| |
| # Tests keep |
| bucketizer.set_handle_invalid('keep') |
| output = bucketizer.transform(self.input_table)[0] |
| field_names = output.get_schema().get_field_names() |
| self.verify_output_result( |
| output, bucketizer.get_output_cols(), field_names, self.expected_keep_result) |
| |
| def test_save_load_and_transform(self): |
| bucketizer = Bucketizer() \ |
| .set_input_cols('f1', 'f2', 'f3') \ |
| .set_output_cols('o1', 'o2', 'o3') \ |
| .set_handle_invalid('keep') \ |
| .set_splits_array(self.splits_array) |
| |
| path = os.path.join(self.temp_dir, 'test_save_load_and_transform_bucketizer') |
| bucketizer.save(path) |
| loaded_bucketizer = Bucketizer.load(self.t_env, path) |
| output = loaded_bucketizer.transform(self.input_table)[0] |
| field_names = output.get_schema().get_field_names() |
| self.verify_output_result( |
| output, bucketizer.get_output_cols(), field_names, self.expected_keep_result) |
| |
| def verify_output_result( |
| self, output: Table, |
| output_cols: List[str], |
| field_names: List[str], |
| expected_result: List[Row]): |
| collected_results = [result for result in |
| self.t_env.to_data_stream(output).execute_and_collect()] |
| results = [] |
| for item in collected_results: |
| item.set_field_names(field_names) |
| fields = [item['id']] |
| for col in output_cols: |
| fields.append(item[col]) |
| results.append(Row(*fields)) |
| self.assertEqual(expected_result, results) |