def exist_file(x):
    if not os.path.isfile(x):
        raise argparse.ArgumentError('{} does not exist'.format(x))
    return x
Initialize GraphAPI with an OAuth access token.
dataset/ETHPy150Open ericgibert/supersid/supersid/supersid_scanner.py/exist_file--crossover with--dataset/ETHPy150Open jgorset/facepy/facepy/graph_api.py/GraphAPI.__init__