import argparse


def _download(bucket=None, obj=None, output_file=None):
    pass

def main():
    parser = argparse.ArgumentParser(description="Download an object from Google Cloud Storage, to a file.")
    parser.add_argument("--bucket", required=True)
    parser.add_argument("--object", required=True)
    parser.add_argument("--output-file", required=True)
    args = parser.parse_args()
    _download(bucket=args.object, blob=args.blob, output_file=args.output_file)
