text: def main():
      """
      :return:
      """
      a = None  # this gets coerced to 0
  
      b = 1
  
      if a is None:  # this evaluates to true ( which it is )
          b = 2
  
      c = a + b  # this evaluates to b + 0, so in this case 2
  
      return c
  