invalid syntax self.from = None in python3 generated parsers

[chengchengpei]

Please include the following information

python3 antlr4 version is 4.9.3

• smallest possible grammar and code that reproduces the behavior

import sys
import antlr4
from PrestoSqlLexer import PrestoSqlLexer
from PrestoSqlParser import PrestoSqlParser


def main():
    input_stream = antlr4.CharStream('select 1')
    lexer = PrestoSqlLexer(input_stream)
    tokens = antlr4.CommonTokenStream(lexer)
    tokens.fill()
    print([token.text for token in tokens.tokens][:-1])


if __name__ == '__main__':
    main()

• description of the expected behavior and actual behavior
  Pointers to suspicious code regions are also very welcome.

error:

Traceback (most recent call last):
  File "/Users/clients/autocomplete/parseQuery.py", line 4, in <module>
    from PrestoSqlParser import PrestoSqlParser
  File "/Users/clients/autocomplete/PrestoSqlParser.py", line 1837
    self.from = None # QualifiedNameContext
         ^^^^
SyntaxError: invalid syntax

[ericvergnaud]

looks like you are using a reserved keyword in you grammar rules ?

[chengchengpei]

I changed to 4.11.1 and the errors gone...

[ericvergnaud]

Please close ?