SQLファイルを読みBigQueryを実行しcsvを保存してくれるPythonスクリプト

import argparse
import pandas as pd


def run_query(sql_file):
    with open(sql_file, 'r') as f:
        query = f.read()

    project_id = 'YOUR_PROJECT_ID'
    df = pd.read_gbq(query, project_id=project_id, dialect='standard')
    return df


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('sql_file')
    parser.add_argument('--output_csv', default='output.csv')

    args = parser.parse_args()

    df = run_query(args.sql_file)
    df.to_csv(args.output_csv, index=False)

$ python bq_runnner.py YOUR_QUERY.sql

pandas==0.25.3
pandas-gbq==0.13.0