input: def square_root(x):
      """
      Calculate the square root of a given integer 'x'. If 'x' is not an integer, raise a TypeError.
  
      >>> square_root(9)
      3.0
      >>> square_root('9')
      Traceback (most recent call last):
          ...
      TypeError: Input must be an integer
      >>> square_root(16.0)
      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