code: def write(proto_dataset_uri, input):
      
      proto_dataset = dtoolcore.ProtoDataSet.from_uri(
          uri=proto_dataset_uri
      )
      _validate_and_put_readme(proto_dataset, input.read())
docs: 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> -