generate libkeyword py from the grammar and tokens files using pgen import argparse from build import buildparser generatetokendefinitions from cgenerator import cparsergenerator template r all iskeyword issoftkeyword kwlist softkwlist kwlist keywords softkwlist softkeywords iskeyword frozensetkwlist contains issoftkeyword frozensetsoftkwlist contains keywords from grammar python gram this file is automatically generated please don t muck it up to update the symbols in this file cd to the top directory of the python source tree and run pythonpath tools peg_generator python3 m pegen keywordgen grammar python gram grammar tokens lib keyword py alternatively you can run make regen keyword __all__ iskeyword issoftkeyword kwlist softkwlist kwlist keywords softkwlist soft_keywords iskeyword frozenset kwlist __contains__ issoftkeyword frozenset softkwlist __contains__
import argparse

from .build import build_parser, generate_token_definitions
from .c_generator import CParserGenerator

TEMPLATE = r.lstrip()


def main() -> None:
    parser = argparse.ArgumentParser(
        description="Generate the Lib/keywords.py file from the grammar."
    )
    parser.add_argument(
        "grammar", type=str, help="The file with the grammar definition in PEG format"
    )
    parser.add_argument(
        "tokens_file", type=argparse.FileType("r"), help="The file with the token definitions"
    )
    parser.add_argument(
        "keyword_file",
        type=argparse.FileType("w"),
        help="The path to write the keyword definitions",
    )
    args = parser.parse_args()

    grammar, _, _ = build_parser(args.grammar)
    with args.tokens_file as tok_file:
        all_tokens, exact_tok, non_exact_tok = generate_token_definitions(tok_file)
    gen = CParserGenerator(grammar, all_tokens, exact_tok, non_exact_tok, file=None)
    gen.collect_rules()

    with args.keyword_file as thefile:
        all_keywords = sorted(list(gen.keywords.keys()))
        all_soft_keywords = sorted(gen.soft_keywords)

        keywords = "" if not all_keywords else "    " + ",\n    ".join(map(repr, all_keywords))
        soft_keywords = (
            "" if not all_soft_keywords else "    " + ",\n    ".join(map(repr, all_soft_keywords))
        )
        thefile.write(TEMPLATE.format(keywords=keywords, soft_keywords=soft_keywords))


if __name__ == "__main__":
    main()