@readme.command()<EOL>@proto_dataset_uri_argument<EOL>@click.argument('<STR_LIT:input>', type=click.File('<STR_LIT:r>'))<EOL>def write(proto_dataset_uri, input):
proto_dataset = dtoolcore.ProtoDataSet.from_uri(<EOL>uri=proto_dataset_uri<EOL>)<EOL>_validate_and_put_readme(proto_dataset, input.read())<EOL>
Use YAML from a file or stdin to populate the readme.

    To stream content from stdin use "-", e.g.

    echo "desc: my data" | dtool readme write <DS_URI> -