input: Write a function to handle the input value for calculating the square root of a number. If the input value is not an integer, the function should raise a TypeError with the message 'Input must be an integer'. 
  def square_root(x):
      if not isinstance(x, int):
          raise TypeError('Input must be an integer')
      return x**0.5
  assert square_root(4)==2.0
  assert square_root(9)==3.0
  try:
      square_root(4.5)
      assert False
  except TypeError as e:
      assert str(e)=='Input must be an integer'
  assert square_root(16)==4.0
  try:
      square_root('four')
      assert False
  except TypeError as e:
      assert str(e)=='Input must be an integer'
output: def square_root(x):
      if not isinstance(x, int):
          raise TypeError('Input must be an integer')
      return x**0.5