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#!/usr/bin/env python

# Copyright 2015, Google, Inc.

# 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.

"""Command-line application that demonstrates using BigQuery with credentials

obtained from an installed app.

This sample is used on this page:

https://cloud.google.com/bigquery/authentication

For more information, see the README.md under /bigquery.

"""

# [START all]

import argparse

import pprint

from googleapiclient import discovery

from googleapiclient.errors import HttpError

from oauth2client import tools

from oauth2client.client import AccessTokenRefreshError

from oauth2client.client import flow_from_clientsecrets

from oauth2client.file import Storage

SCOPES = ['https://www.googleapis.com/auth/bigquery']

# Update with the full path to your client secrets json file.

CLIENT_SECRETS = 'client_secrets.json'

def main(args):

storage = Storage('credentials.dat')

credentials = storage.get()

if credentials is None or credentials.invalid:

flow = flow_from_clientsecrets(

CLIENT_SECRETS, scope=SCOPES)

# run_flow will prompt the user to authorize the application's

# access to BigQuery and return the credentials.

credentials = tools.run_flow(flow, storage, args)

# Create a BigQuery client using the credentials.

bigquery_service = discovery.build(

'bigquery', 'v2', credentials=credentials)

# List all datasets in BigQuery

try:

datasets = bigquery_service.datasets()

listReply = datasets.list(projectId=args.project_id).execute()

print('Dataset list:')

pprint.pprint(listReply)

except HttpError as err:

print('Error in listDatasets:')

pprint.pprint(err.content)

except AccessTokenRefreshError:

print('Credentials have been revoked or expired, please re-run'

'the application to re-authorize')

if __name__ == '__main__':

parser = argparse.ArgumentParser(

description=__doc__,

formatter_class=argparse.RawDescriptionHelpFormatter,

# Use oauth2client's argparse as a base, so that the flags needed

# for run_flow are available.

parents=[tools.argparser])

parser.add_argument(

'project_id', help='Your Google Cloud Project ID.')

args = parser.parse_args()

main(args)

# [END all]