Standalone Parser

This example demonstrates how to generate and use the standalone parser, using the JSON example.

See README.md for more details.

import sys

from json_parser import Lark_StandAlone, Transformer, v_args

inline_args = v_args(inline=True)

class TreeToJson(Transformer):
    @inline_args
    def string(self, s):
        return s[1:-1].replace('\\"', '"')

    array = list
    pair = tuple
    object = dict
    number = inline_args(float)

    null = lambda self, _: None
    true = lambda self, _: True
    false = lambda self, _: False


parser = Lark_StandAlone(transformer=TreeToJson())

if __name__ == '__main__':
    with open(sys.argv[1]) as f:
        print(parser.parse(f.read()))