[GitHub] [flink] shuiqiangchen commented on a change in pull request #13061: [FLINK-18764][python] Add DataStream class and support from_collectio…

[GitBox <gi...@apache.org>]

shuiqiangchen commented on a change in pull request #13061:
URL: https://github.com/apache/flink/pull/13061#discussion_r465444604



##########
File path: flink-python/pyflink/datastream/tests/test_stream_execution_environment.py
##########
@@ -22,9 +22,12 @@
 
 import unittest
 
+

Review comment:
       Thank you, I will pay more attention to it.

##########
File path: flink-python/pyflink/datastream/tests/test_stream_execution_environment.py
##########
@@ -211,3 +214,31 @@ def test_execute(self):
         self.assertEqual(len(execution_result.get_all_accumulator_results()), 0)
         self.assertIsNone(execution_result.get_accumulator_result('accumulator'))
         self.assertIsNotNone(str(execution_result))
+
+    def test_from_collection_without_data_types(self):
+        ds = self.env.from_collection([(1, 'Hi', 'Hello'), (2, 'Hello', 'Hi')])
+        test_sink = DataStreamTestCollectSink(True)
+        ds._j_data_stream.addSink(test_sink._j_data_stream_test_collect_sink)

Review comment:
       Yes, there might be some spaces for improvements.

##########
File path: flink-python/pyflink/datastream/tests/test_util.py
##########
@@ -0,0 +1,45 @@
+################################################################################
+#  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 pickle
+
+from pyflink.java_gateway import get_gateway
+
+
+class DataStreamTestCollectSink(object):

Review comment:
       Ok, I will do it.

##########
File path: flink-python/pyflink/datastream/data_stream.py
##########
@@ -0,0 +1,162 @@
+################################################################################
+#  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.
+################################################################################
+from pyflink.common import typeinfo, ExecutionConfig
+from pyflink.common.typeinfo import TypeInformation
+
+
+class DataStream(object):
+    """
+    A DataStream represents a stream of elements of the same type. A DataStream can be transformed
+    into another DataStream by applying a transformation as for example:
+    ::
+        >>> DataStream.map(MapFunctionImpl())
+        >>> DataStream.filter(FilterFunctionImpl())
+    """
+
+    def __init__(self, j_data_stream):
+        self._j_data_stream = j_data_stream
+
+    def get_name(self) -> str:
+        """
+        Gets the name of the current data stream. This name is used by the visualization and logging
+        during runtime.
+
+        :return: Name of the stream.
+        """
+        return self._j_data_stream.getName()
+
+    def name(self, name: str):

Review comment:
       Yes, I will add the corresponding tests to verify them.




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