Use None to indicate output to stdout.
@@ -182,6 +182,8 @@ def run(input_file,
input = str(KGTKArgumentParser.get_input_file(input_file))
output = str(KGTKArgumentParser.get_output_file(output_file))
+ if output == "-":
+ output = None
# logging.basicConfig(level=logging.INFO)
