Add samples for Data Catalog lookup_entry [(#2148)](GoogleCloudPlatfo…

…rm/python-docs-samples#2148)

* Add samples for Data Catalog lookup_entry

* Add tests for Data Catalog lookup_entry

* Add samples for lookup_entry by SQL Resource

* Add README.rst

* Improve command line interface

* Removed the "lookup-" prefix from commands
* Handle the --sql-resource optional argument by subparsers

* Refer to GCP public assets in tests

packages/google-cloud-datacatalog/samples/snippets/README.rst

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+.. This file is automatically generated. Do not edit this file directly.
+
+Google Cloud Data Catalog Python Samples
+===============================================================================
+
+.. image:: https://gstatic.com/cloudssh/images/open-btn.png
+   :target: https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/python-docs-samples&page=editor&open_in_editor=datacatalog/cloud-client/README.rst
+
+
+This directory contains samples for Google Cloud Data Catalog. `Google Cloud Data Catalog`_ is a fully managed and scalable metadata management service that empowers organizations to quickly discover, manage, and understand all their data in Google Cloud.
+
+
+
+
+.. _Google Cloud Data Catalog: https://cloud.google.com/data-catalog/docs
+
+Setup
+-------------------------------------------------------------------------------
+
+
+Authentication
+++++++++++++++
+
+This sample requires you to have authentication setup. Refer to the
+`Authentication Getting Started Guide`_ for instructions on setting up
+credentials for applications.
+
+.. _Authentication Getting Started Guide:
+    https://cloud.google.com/docs/authentication/getting-started
+
+Install Dependencies
+++++++++++++++++++++
+
+#. Clone python-docs-samples and change directory to the sample directory you want to use.
+
+    .. code-block:: bash
+
+        $ git clone https://github.com/GoogleCloudPlatform/python-docs-samples.git
+
+#. Install `pip`_ and `virtualenv`_ if you do not already have them. You may want to refer to the `Python Development Environment Setup Guide`_ for Google Cloud Platform for instructions.
+
+   .. _Python Development Environment Setup Guide:
+       https://cloud.google.com/python/setup
+
+#. Create a virtualenv. Samples are compatible with Python 2.7 and 3.4+.
+
+    .. code-block:: bash
+
+        $ virtualenv env
+        $ source env/bin/activate
+
+#. Install the dependencies needed to run the samples.
+
+    .. code-block:: bash
+
+        $ pip install -r requirements.txt
+
+.. _pip: https://pip.pypa.io/
+.. _virtualenv: https://virtualenv.pypa.io/
+
+Samples
+-------------------------------------------------------------------------------
+
+Lookup entry
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+.. image:: https://gstatic.com/cloudssh/images/open-btn.png
+   :target: https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/python-docs-samples&page=editor&open_in_editor=datacatalog/cloud-client/lookup_entry.py,datacatalog/cloud-client/README.rst
+
+
+
+
+To run this sample:
+
+.. code-block:: bash
+
+    $ python lookup_entry.py
+
+    usage: lookup_entry.py [-h]
+                           project_id
+                           {bigquery-dataset,bigquery-table,pubsub-topic} ...
+
+    This application demonstrates how to perform basic operations on entries
+    with the Cloud Data Catalog API.
+
+    For more information, see the README.md under /datacatalog and the
+    documentation at https://cloud.google.com/data-catalog/docs.
+
+    positional arguments:
+      project_id            Your Google Cloud project ID
+      {bigquery-dataset,bigquery-table,pubsub-topic}
+        bigquery-dataset    Retrieves Data Catalog entry for the given BigQuery
+                            Dataset.
+        bigquery-table      Retrieves Data Catalog entry for the given BigQuery
+                            Table.
+        pubsub-topic        Retrieves Data Catalog entry for the given Pub/Sub
+                            Topic.
+
+    optional arguments:
+      -h, --help            show this help message and exit
+
+
+
+
+
+The client library
+-------------------------------------------------------------------------------
+
+This sample uses the `Google Cloud Client Library for Python`_.
+You can read the documentation for more details on API usage and use GitHub
+to `browse the source`_ and  `report issues`_.
+
+.. _Google Cloud Client Library for Python:
+    https://googlecloudplatform.github.io/google-cloud-python/
+.. _browse the source:
+    https://github.com/GoogleCloudPlatform/google-cloud-python
+.. _report issues:
+    https://github.com/GoogleCloudPlatform/google-cloud-python/issues
+
+
+.. _Google Cloud SDK: https://cloud.google.com/sdk/

packages/google-cloud-datacatalog/samples/snippets/README.rst.in

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+# This file is used to generate README.rst
+
+product:
+  name: Google Cloud Data Catalog
+  short_name: Data Catalog
+  url: https://cloud.google.com/data-catalog/docs
+  description: >
+    `Google Cloud Data Catalog`_ is a fully managed and scalable metadata
+    management service that empowers organizations to quickly discover, manage,
+    and understand all their data in Google Cloud.
+
+setup:
+- auth
+- install_deps
+
+samples:
+- name: Lookup entry
+  file: lookup_entry.py
+  show_help: true
+
+cloud_client_library: true
+
+folder: datacatalog/cloud-client

packages/google-cloud-datacatalog/samples/snippets/lookup_entry.py

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+#!/usr/bin/env python
+
+# Copyright 2019 Google Inc. All Rights Reserved.
+#
+# Licensed 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.
+
+"""This application demonstrates how to perform basic operations on entries
+with the Cloud Data Catalog API.
+
+For more information, see the README.md under /datacatalog and the
+documentation at https://cloud.google.com/data-catalog/docs.
+"""
+
+import argparse
+
+
+def lookup_bigquery_dataset(project_id, dataset_id):
+    """Retrieves Data Catalog entry for the given BigQuery Dataset."""
+    from google.cloud import datacatalog_v1beta1
+
+    datacatalog = datacatalog_v1beta1.DataCatalogClient()
+
+    resource_name = '//bigquery.googleapis.com/projects/{}/datasets/{}'\
+        .format(project_id, dataset_id)
+
+    return datacatalog.lookup_entry(linked_resource=resource_name)
+
+
+def lookup_bigquery_dataset_sql_resource(project_id, dataset_id):
+    """Retrieves Data Catalog entry for the given BigQuery Dataset by
+    sql_resource.
+    """
+    from google.cloud import datacatalog_v1beta1
+
+    datacatalog = datacatalog_v1beta1.DataCatalogClient()
+
+    sql_resource = 'bigquery.dataset.`{}`.`{}`'.format(project_id, dataset_id)
+
+    return datacatalog.lookup_entry(sql_resource=sql_resource)
+
+
+def lookup_bigquery_table(project_id, dataset_id, table_id):
+    """Retrieves Data Catalog entry for the given BigQuery Table."""
+    from google.cloud import datacatalog_v1beta1
+
+    datacatalog = datacatalog_v1beta1.DataCatalogClient()
+
+    resource_name = '//bigquery.googleapis.com/projects/{}/datasets/{}' \
+                    '/tables/{}'\
+        .format(project_id, dataset_id, table_id)
+
+    return datacatalog.lookup_entry(linked_resource=resource_name)
+
+
+def lookup_bigquery_table_sql_resource(project_id, dataset_id, table_id):
+    """Retrieves Data Catalog entry for the given BigQuery Table by
+    sql_resource.
+    """
+    from google.cloud import datacatalog_v1beta1
+
+    datacatalog = datacatalog_v1beta1.DataCatalogClient()
+
+    sql_resource = 'bigquery.table.`{}`.`{}`.`{}`'.format(
+        project_id, dataset_id, table_id)
+
+    return datacatalog.lookup_entry(sql_resource=sql_resource)
+
+
+def lookup_pubsub_topic(project_id, topic_id):
+    """Retrieves Data Catalog entry for the given Pub/Sub Topic."""
+    from google.cloud import datacatalog_v1beta1
+
+    datacatalog = datacatalog_v1beta1.DataCatalogClient()
+
+    resource_name = '//pubsub.googleapis.com/projects/{}/topics/{}'\
+        .format(project_id, topic_id)
+
+    return datacatalog.lookup_entry(linked_resource=resource_name)
+
+
+def lookup_pubsub_topic_sql_resource(project_id, topic_id):
+    """Retrieves Data Catalog entry for the given Pub/Sub Topic by
+    sql_resource.
+    """
+    from google.cloud import datacatalog_v1beta1
+
+    datacatalog = datacatalog_v1beta1.DataCatalogClient()
+
+    sql_resource = 'pubsub.topic.`{}`.`{}`'.format(project_id, topic_id)
+
+    return datacatalog.lookup_entry(sql_resource=sql_resource)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(
+        description=__doc__,
+        formatter_class=argparse.RawDescriptionHelpFormatter
+    )
+
+    parser.add_argument('project_id', help='Your Google Cloud project ID')
+
+    subparsers = parser.add_subparsers(dest='command')
+
+    bigquery_dataset_parser = subparsers.add_parser(
+        'bigquery-dataset', help=lookup_bigquery_dataset.__doc__)
+    bigquery_dataset_parser.add_argument('dataset_id')
+    bigquery_dataset_parser.add_argument('--sql-resource', action='store_true',
+                                         help='Perform lookup by SQL Resource')
+
+    bigquery_table_parser = subparsers.add_parser(
+        'bigquery-table', help=lookup_bigquery_table.__doc__)
+    bigquery_table_parser.add_argument('dataset_id')
+    bigquery_table_parser.add_argument('table_id')
+    bigquery_table_parser.add_argument('--sql-resource', action='store_true',
+                                       help='Perform lookup by SQL Resource')
+
+    pubsub_topic_parser = subparsers.add_parser(
+        'pubsub-topic', help=lookup_pubsub_topic.__doc__)
+    pubsub_topic_parser.add_argument('topic_id')
+    pubsub_topic_parser.add_argument('--sql-resource', action='store_true',
+                                     help='Perform lookup by SQL Resource')
+
+    args = parser.parse_args()
+
+    entry = None
+
+    if args.command == 'bigquery-dataset':
+        lookup_method = lookup_bigquery_dataset_sql_resource \
+            if args.sql_resource else lookup_bigquery_dataset
+        entry = lookup_method(args.project_id, args.dataset_id)
+    elif args.command == 'bigquery-table':
+        lookup_method = lookup_bigquery_table_sql_resource \
+            if args.sql_resource else lookup_bigquery_table
+        entry = lookup_method(args.project_id, args.dataset_id, args.table_id)
+    elif args.command == 'pubsub-topic':
+        lookup_method = lookup_pubsub_topic_sql_resource \
+            if args.sql_resource else lookup_pubsub_topic
+        entry = lookup_method(args.project_id, args.topic_id)
+
+    print(entry.name)

packages/google-cloud-datacatalog/samples/snippets/lookup_entry_test.py

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+#!/usr/bin/env python
+
+# Copyright 2019 Google Inc. All Rights Reserved.
+#
+# Licensed 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 lookup_entry
+
+BIGQUERY_PROJECT = 'bigquery-public-data'
+BIGQUERY_DATASET = 'new_york_taxi_trips'
+BIGQUERY_TABLE = 'taxi_zone_geom'
+
+PUBSUB_PROJECT = 'pubsub-public-data'
+PUBSUB_TOPIC = 'taxirides-realtime'
+
+
+def test_lookup_bigquery_dataset():
+    assert lookup_entry.lookup_bigquery_dataset(
+        BIGQUERY_PROJECT, BIGQUERY_DATASET)
+
+
+def test_lookup_bigquery_dataset_sql_resource():
+    assert lookup_entry.lookup_bigquery_dataset_sql_resource(
+        BIGQUERY_PROJECT, BIGQUERY_DATASET)
+
+
+def test_lookup_bigquery_table():
+    assert lookup_entry.lookup_bigquery_table(
+        BIGQUERY_PROJECT, BIGQUERY_DATASET, BIGQUERY_TABLE)
+
+
+def test_lookup_bigquery_table_sql_resource():
+    assert lookup_entry.lookup_bigquery_table_sql_resource(
+        BIGQUERY_PROJECT, BIGQUERY_DATASET, BIGQUERY_TABLE)
+
+
+def test_lookup_pubsub_topic():
+    assert lookup_entry.lookup_pubsub_topic(PUBSUB_PROJECT, PUBSUB_TOPIC)
+
+
+def test_lookup_pubsub_topic_sql_resource():
+    assert lookup_entry.lookup_pubsub_topic_sql_resource(
+        PUBSUB_PROJECT, PUBSUB_TOPIC)

packages/google-cloud-datacatalog/samples/snippets/requirements.txt

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+google-cloud-datacatalog==0.1.0