input: 
  def square_root(x):
      """
      Calculate the square root of the input value, but raise an exception if the input 
      is not an integer.
      >>> square_root(25)
      5.0
      >>> square_root('25')
      Traceback (most recent call last):
      ...
      TypeError: Input must be an integer
      """
      if not isinstance(x, int):
          raise TypeError('Input must be an integer')
      return x**0.5
  
output:     if not isinstance(x, int):
          raise TypeError('Input must be an integer')
      return x**0.5