repos/googleapis-python-bigquery-e731b40/samples/dataset_exists.py

# Copyright 2019 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
#
#     https://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.


def dataset_exists(dataset_id: str) -> None:
    # [START bigquery_dataset_exists]
    from google.cloud import bigquery
    from google.cloud.exceptions import NotFound

    client = bigquery.Client()

    # TODO(developer): Set dataset_id to the ID of the dataset to determine existence.
    # dataset_id = "your-project.your_dataset"

    try:
        client.get_dataset(dataset_id)  # Make an API request.
        print("Dataset {} already exists".format(dataset_id))
    except NotFound:
        print("Dataset {} is not found".format(dataset_id))
    # [END bigquery_dataset_exists]