Add BigQuery Remote Vision Function code sample

.github/CODEOWNERS

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 /appengine/standard_python3/spanner/*        @GoogleCloudPlatform/api-spanner-python @GoogleCloudPlatform/python-samples-reviewers
 /auth/**/*                             @arithmetic1728 @GoogleCloudPlatform/python-samples-reviewers
 /bigquery/**/*                         @chalmerlowe @GoogleCloudPlatform/python-samples-reviewers
+/bigquery/remote_function/**/*         @autoerr @GoogleCloudPlatform/python-samples-reviewers
 /billing/**/*                          @GoogleCloudPlatform/billing-samples-maintainers @GoogleCloudPlatform/python-samples-reviewers
 /blog/**/*                             @GoogleCloudPlatform/python-samples-reviewers
 /cdn/**/*                              @mpwarres @GoogleCloudPlatform/python-samples-reviewers

bigquery/remote-function/README.rst

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+.. This file is automatically generated. Do not edit this file directly.
+
+BigQuery Remote Function 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=/README.rst
+
+
+This directory contains samples for BigQuery Remote Function. `BigQuery Remote Function`_ allows you to analyze structured and unstructured data by integrating services outside BigQuery including Vision, Document AI, Speech-to-Text etc.
+
+
+
+
+.. _BigQuery Remote Function: https://cloud.google.com/bigquery/docs/reference/standard-sql/remote-functions
+
+
+
+
+
+
+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 3.6+.
+
+    .. 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
+-------------------------------------------------------------------------------
+
+- `Vision`_: this sample can detect and extract objects from input images.
+
+
+.. _Vision: vision/
+
+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/

bigquery/remote-function/README.rst.in

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+# This file is used to generate README.rst
+# python3 ../../scripts/readme-gen/readme_gen.py README.rst.in
+
+product:
+  name: BigQuery Remote Function
+  short_name: BigQuery Remote Function
+  url: https://cloud.google.com/bigquery/docs/reference/standard-sql/remote-functions
+  description: >
+    BigQuery Remote Function allows you to analyze structured and unstructured data by integrating services outside BigQuery including Vision, Document AI, Speech-to-Text etc.
+
+setup:
+- auth
+- install_deps
+
+samples:
+- name: Vision
+  file: vision/vision_function.py
+
+cloud_client_library: true

bigquery/remote-function/vision/noxfile_config.py

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+# Copyright 2022 Google LLC
+#
+# 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.
+
+# TEST_CONFIG_OVERRIDE copied from the source of truth:
+# https://github.com/GoogleCloudPlatform/python-docs-samples/blob/main/noxfile_config.py
+
+TEST_CONFIG_OVERRIDE = {
+    # You can opt out from the test for specific Python versions.
+    "ignored_versions": ["2.7"],
+    # Old samples are opted out of enforcing Python type hints
+    # All new samples should feature them
+    "enforce_type_hints": True,
+    # An envvar key for determining the project id to use. Change it
+    # to 'BUILD_SPECIFIC_GCLOUD_PROJECT' if you want to opt in using a
+    # build specific Cloud project. You can also use your own string
+    # to use your own Cloud project.
+    "gcloud_project_env": "GOOGLE_CLOUD_PROJECT",
+    # 'gcloud_project_env': 'BUILD_SPECIFIC_GCLOUD_PROJECT',
+    # A dictionary you want to inject into your test. Don't put any
+    # secrets here. These values will override predefined values.
+    "envs": {},
+}

bigquery/remote-function/vision/requirements-test.txt

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+Flask==2.2.2
+functions-framework==3.2.0
+google-cloud-vision==3.1.2
+pytest==7.1.3

bigquery/remote-function/vision/requirements.txt

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+Flask==2.2.2
+functions-framework==3.2.0
+google-cloud-vision==3.1.2

bigquery/remote-function/vision/vision_function.py

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+# Copyright 2022 Google LLC
+#
+# 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.
+
+# [START bigquery_remote_function_vision]
+import flask
+import functions_framework
+from google.cloud import vision_v1
+
+
+@functions_framework.http
+def label_detection(request: flask.Request) -> flask.Response:
+    """BigQuery remote function to label input images.
+    Args:
+        request: HTTP request from BigQuery
+        https://cloud.google.com/bigquery/docs/reference/standard-sql/remote-functions#input_format
+    Returns:
+        HTTP response to BigQuery
+        https://cloud.google.com/bigquery/docs/reference/standard-sql/remote-functions#output_format
+    """
+    try:
+        client = vision_v1.ImageAnnotatorClient()
+        calls = request.get_json()['calls']
+        replies = []
+        for call in calls:
+            results = client.label_detection(
+                {'source': {'image_uri': call[0]}})
+            replies.append(vision_v1.AnnotateImageResponse.to_dict(results))
+        return flask.make_response(flask.jsonify({'replies': replies}))
+    except Exception as e:
+        return flask.make_response(flask.jsonify({'errorMessage': str(e)}), 400)
+# [END bigquery_remote_function_vision]

bigquery/remote-function/vision/vision_function_test.py

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+# Copyright 2022 Google LLC
+#
+# 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.
+
+from unittest import mock
+
+import flask
+from google.cloud import vision_v1
+import pytest
+
+import vision_function
+
+
+# Create a fake "app" for generating test request contexts.
+@pytest.fixture(scope="module")
+def app() -> flask.Flask:
+    return flask.Flask(__name__)
+
+
+@mock.patch('vision_function.vision_v1')
+def test_vision_function(mock_vision_v1: object, app: flask.Flask) -> None:
+    label_detection_mock = mock.Mock(side_effect=[
+        vision_v1.AnnotateImageResponse(
+            {'label_annotations': [{'description': 'apple'}]}),
+        vision_v1.AnnotateImageResponse(
+            {'label_annotations': [{'description': 'banana'}]})])
+    mock_vision_v1.ImageAnnotatorClient = mock.Mock(
+        return_value=mock.Mock(label_detection=label_detection_mock))
+    mock_vision_v1.AnnotateImageResponse = vision_v1.AnnotateImageResponse
+    with app.test_request_context(
+            json={'calls': [['https://storage.googleapis.com/bucket/apple'],
+                            ['https://storage.googleapis.com/bucket/banana']]}):
+        response = vision_function.label_detection(flask.request)
+        assert response.status_code == 200
+        assert len(response.get_json()['replies']) == 2
+        assert 'apple' in str(response.get_json()['replies'][0])
+        assert 'banana' in str(response.get_json()['replies'][1])
+
+
+@mock.patch('vision_function.vision_v1')
+def test_vision_function_error(
+        mock_vision_v1: object, app: flask.Flask) -> None:
+    label_detection_mock = mock.Mock(side_effect=Exception('API error'))
+    mock_vision_v1.ImageAnnotatorClient = mock.Mock(
+        return_value=mock.Mock(label_detection=label_detection_mock))
+    with app.test_request_context(
+            json={'calls': [['https://storage.googleapis.com/bucket/apple'],
+                            ['https://storage.googleapis.com/bucket/banana']]}):
+        response = vision_function.label_detection(flask.request)
+        assert response.status_code == 400
+        assert 'API error' in str(response.get_data())