input: from typing import List
  
  def add(a: float, b: float) -> None:
      """ Adds two numbers together and prints the result.
      
      >>> add(5, 7)
      12
      >>> add(3.5, 2.5)
      6.0
      """
      sum = a + b
      print(sum)
output:     sum = a + b
      print(sum)