Function maybe

tools/python-3.11.9-amd64/Lib/tokenize.py:61–61

(*choices)

def group(*choices): return '(' + '|'.join(choices) + ')'
def any(*choices): return group(*choices) + '*'
def maybe(*choices): return group(*choices) + '?'

# Note: we use unicode matching for names ("\w") but ascii matching for
# number literals.