Advent of code 2020 day 18 too compact

def compute(s, part2=False):

  def eval_term(i):
    return eval_seq(i + 1, eat=1) if s[i] == '(' else (int(s[i]), i + 1)

  def eval_seq(i, eat=0):
    value, i = eval_term(i)
    while i < len(s) and s[i] != ')':
      is_mul = s[i + 1] == '*'
      value2, i = (eval_seq if part2 and is_mul else eval_term)(i + 3)
      value = value * value2 if is_mul else value + value2
    return value, i + eat

  return eval_seq(0)[0]