usage: jp.py [-h] [-f FILENAME] [--ast] expression jp.py: error: the following arguments are required: expression

usage: jp.py [-h] [-f FILENAME] [--ast] expression positional arguments: expression optional arguments: -h, --help show this help message and exit -f FILENAME, --filename FILENAME The filename containing the input data. If a filename is not given then data is read from stdin. --ast Pretty print the AST, do not search the data.