code: def is_type(valid_type):
      
      def validate(value, should_raise=True):
          if not isinstance(value, valid_type):
              if should_raise:
                  raise TypeError("Expected value of type {expected}, actual value was of type {actual}.".format(
                      expected=valid_type, actual=type(value)))
              return False
          return True
      return validate
docs: Returns a validator function that succeeds only for inputs of the provided valid_type.
  
      :param type valid_type: the type that should be considered valid for the validator
      :returns: a function which returns True its input is an instance of valid_type, and raises TypeError otherwise
      :rtype: callable