# Owner(s): ["module: unknown"]

import argparse

import torch


if __name__ == "__main__":
    parser = argparse.ArgumentParser()

    # Required args. Raises error if they aren't passed.
    parser.add_argument("--foo", help="foo", required=True)
    parser.add_argument("--bar", help="bar", required=True)
    _ = parser.parse_args()

    x = torch.ones((3, 3), requires_grad=True)
    (3 * x).sum().backward()