antlr4.13 target javascript or typescript generate python code in the lexer file

[Elmahdi1962]

when using the javascript or typescript target to genearte the parser the lexer file has pythoncode combined with little bit of javascript code,

// Generated from src/backend/pythonAntlrParser/Python3.g4 by ANTLR 4.9.0-SNAPSHOT


from antlr4.Token import CommonToken
import re
import importlib

# Allow languages to extend the lexer and parser, by loading the parser dynamically
module_path = __name__[:-5]
language_name = __name__.split('.')[-1]
language_name = language_name[:-5]  # Remove Lexer from name
LanguageParser = getattr(importlib.import_module('{}Parser'.format(module_path)), '{}Parser'.format(language_name))


import { ATN } from "antlr4ts/atn/ATN";
import { ATNDeserializer } from "antlr4ts/atn/ATNDeserializer";
import { CharStream } from "antlr4ts/CharStream";
import { Lexer } from "antlr4ts/Lexer";
import { LexerATNSimulator } from "antlr4ts/atn/LexerATNSimulator";
import { NotNull } from "antlr4ts/Decorators";
import { Override } from "antlr4ts/Decorators";
import { RuleContext } from "antlr4ts/RuleContext";
import { Vocabulary } from "antlr4ts/Vocabulary";
import { VocabularyImpl } from "antlr4ts/VocabularyImpl";

import * as Utils from "antlr4ts/misc/Utils";


export class Python3Lexer extends Lexer {
	public static readonly STRING = 1;
	public static readonly NUMBER = 2;
	public static readonly INTEGER = 3;
	public static readonly DEF = 4;
	public static readonly RETURN = 5;
	public static readonly RAISE = 6;

`line 193:	// @Override
// @NotNull
public get vocabulary(): Vocabulary {
	return Python3Lexer.VOCABULARY;
}
// tslint:enable:no-trailing-whitespace


@property
def tokens(self):
    try:
        return self._tokens
    except AttributeError:
        self._tokens = []
        return self._tokens

@property
def indents(self):
    try:
        return self._indents
    except AttributeError:
        self._indents = []
        return self._indents

@property
def opened(self):
    try:
        return self._opened
    except AttributeError:
        self._opened = 0
        return self._opened`

[ericvergnaud]

The culprit code comes from the grammar not from antlr.
You need to use a grammar with production code suitable for JS

[Elmahdi1962]

i used the python3 grammar from the antlr's grammar repo as i want to parse python code https://github.com/antlr/grammars-v4/blob/master/python/python3-py/Python3.g4

[Elmahdi1962]

yea i apparently i took the wrong one