python client for column lineage API

Signed-off-by: Pawel Leszczynski <leszczynski.pawel@gmail.com>

CHANGELOG.md

@@ -10,6 +10,7 @@
 * Downstream column lineage [`#2159`](https://github.com/MarquezProject/marquez/pull/2159) [@pawel-big-lebowski](https://github.com/pawel-big-lebowski)
 * Column lineage within Marquez Java client  [`#2163`](https://github.com/MarquezProject/marquez/pull/2163) [@pawel-big-lebowski](https://github.com/pawel-big-lebowski)
 * Endpoint to get column lineage by a job [`#2204`](https://github.com/MarquezProject/marquez/pull/2204) [@pawel-big-lebowski](https://github.com/pawel-big-lebowski)
+* Python client for column lineage [`#2209`](https://github.com/MarquezProject/marquez/pull/2209) [@pawel-big-lebowski](https://github.com/pawel-big-lebowski)
 
 
 ### Fixed

clients/python/marquez_client/client.py

@@ -17,6 +17,8 @@
     DEFAULT_TIMEOUT_MS,
     DEFAULT_LIMIT,
     DEFAULT_OFFSET,
+    DEFAULT_DEPTH,
+    DEFAULT_WITH_DOWNSTREAM,
     API_PATH_V1
 )
 from marquez_client.models import (
@@ -341,6 +343,35 @@ def get_job_run(self, run_id):
         Utils.is_valid_uuid(run_id, 'run_id')
         return self._get(self._url('/jobs/runs/{0}', run_id))
 
+    def get_column_lineage_by_dataset(self, namespace, dataset, depth=None, with_downstream=None):
+        node_id = "dataset:{0}:{1}".format(namespace, dataset)
+        return self._get_column_lineage(node_id, depth, with_downstream)
+
+    def get_column_lineage_by_dataset_field(
+            self,
+            namespace,
+            dataset,
+            field,
+            depth=None,
+            with_downstream=None
+    ):
+        node_id = "datasetField:{0}:{1}:{2}".format(namespace, dataset, field)
+        return self._get_column_lineage(node_id, depth, with_downstream)
+
+    def get_column_lineage_by_job(self, namespace, job, depth=None, with_downstream=None):
+        node_id = "job:{0}:{1}".format(namespace, job)
+        return self._get_column_lineage(node_id, depth, with_downstream)
+
+    def _get_column_lineage(self, node_id, depth, with_downstream):
+        return self._get(
+            self._url('/column-lineage'),
+            params={
+                'nodeId': node_id,
+                'depth': depth or DEFAULT_DEPTH,
+                'withDownstream': with_downstream or DEFAULT_WITH_DOWNSTREAM
+            }
+        )
+
     @deprecated(deprecated_in='0.20.0', removed_in='0.25.0',
                 details='Use OpenLineage instead, see `https://openlineage.io`')
     def mark_job_run_as_started(self, run_id, at=None):

clients/python/marquez_client/constants.py

@@ -6,5 +6,7 @@
 DEFAULT_MARQUEZ_URL = 'http://localhost:8080'
 DEFAULT_LIMIT = 100
 DEFAULT_OFFSET = 0
+DEFAULT_DEPTH = 20
+DEFAULT_WITH_DOWNSTREAM = False
 
 API_PATH_V1 = '/api/v1'

clients/python/tests/test_marquez_client.py

@@ -11,7 +11,9 @@
 from marquez_client import MarquezClient
 from marquez_client.constants import (
     DEFAULT_LIMIT,
-    DEFAULT_OFFSET
+    DEFAULT_OFFSET,
+    DEFAULT_DEPTH,
+    DEFAULT_WITH_DOWNSTREAM
 )
 from marquez_client.models import (
     DatasetType,
@@ -237,6 +239,37 @@
     'producer': PRODUCER
 }
 
+COLUMN_LINEAGE = [
+    {
+        'id': 'datasetField:namespace:commonDataset:columnA',
+        'type': 'DATASET_FIELD',
+        'data': {
+            'type': 'DATASET_FIELD',
+            'namespace': 'namespace',
+            'dataset': 'otherDataset',
+            'field': 'columnA',
+            'fieldType': 'integer',
+            'transformationDescription': 'identical',
+            'transformationType': 'IDENTITY',
+            'inputFields': [
+                {'namespace': 'namespace', 'dataset':  'otherDataset', 'field': 'columnB'}
+            ]
+        },
+        'inEdges': [
+            {
+                'origin': 'datasetField:namespace:otherDataset:columnB',
+                'destination': 'datasetField:namespace:commonDataset:columnA'
+            }
+        ],
+        'outEdges': [
+            {
+                'origin': 'datasetField:namespace:commonDataset:columnA',
+                'destination': 'datasetField:namespace:otherDataset:columnC'
+            }
+        ]
+    }
+]
+
 
 @pytest.fixture
 def client():
@@ -938,3 +971,88 @@ def test_list_tags(mock_get, client):
         },
         timeout=mock.ANY
     )
+
+
+@mock.patch('requests.get')
+def test_get_column_lineage_by_dataset(mock_get, client):
+    mock_get.return_value.status_code.return_value = HTTPStatus.OK
+    mock_get.return_value.json.return_value = COLUMN_LINEAGE
+
+    column_lineage = client.get_column_lineage_by_dataset(
+        "namespace_a",
+        "dataset_a",
+        DEFAULT_DEPTH,
+        DEFAULT_WITH_DOWNSTREAM
+    )
+
+    assert column_lineage == COLUMN_LINEAGE
+
+    mock_get.assert_called_once_with(
+        url=client._url(
+            '/column-lineage'
+        ),
+        headers=mock.ANY,
+        params={
+            'nodeId': 'dataset:namespace_a:dataset_a',
+            'depth': DEFAULT_DEPTH,
+            'withDownstream': DEFAULT_WITH_DOWNSTREAM
+        },
+        timeout=mock.ANY
+    )
+
+
+@mock.patch('requests.get')
+def test_get_column_lineage_by_dataset_field(mock_get, client):
+    mock_get.return_value.status_code.return_value = HTTPStatus.OK
+    mock_get.return_value.json.return_value = COLUMN_LINEAGE
+
+    column_lineage = client.get_column_lineage_by_dataset_field(
+        "namespace_a",
+        "dataset_a",
+        "field_a",
+        DEFAULT_DEPTH,
+        DEFAULT_WITH_DOWNSTREAM
+    )
+
+    assert column_lineage == COLUMN_LINEAGE
+
+    mock_get.assert_called_once_with(
+        url=client._url(
+            '/column-lineage'
+        ),
+        headers=mock.ANY,
+        params={
+            'nodeId': 'datasetField:namespace_a:dataset_a:field_a',
+            'depth': DEFAULT_DEPTH,
+            'withDownstream': DEFAULT_WITH_DOWNSTREAM
+        },
+        timeout=mock.ANY
+    )
+
+
+@mock.patch('requests.get')
+def test_get_column_lineage_by_job(mock_get, client):
+    mock_get.return_value.status_code.return_value = HTTPStatus.OK
+    mock_get.return_value.json.return_value = COLUMN_LINEAGE
+
+    column_lineage = client.get_column_lineage_by_job(
+        "namespace_a",
+        "job_a",
+        DEFAULT_DEPTH,
+        DEFAULT_WITH_DOWNSTREAM
+    )
+
+    assert column_lineage == COLUMN_LINEAGE
+
+    mock_get.assert_called_once_with(
+        url=client._url(
+            '/column-lineage'
+        ),
+        headers=mock.ANY,
+        params={
+            'nodeId': 'job:namespace_a:job_a',
+            'depth': DEFAULT_DEPTH,
+            'withDownstream': DEFAULT_WITH_DOWNSTREAM
+        },
+        timeout=mock.ANY
+    )