def is_non_empty_string(input_string):
    """
    Validate if non empty string

    :param input_string: Input is a *str*.
    :return: True if input is string and non empty.
       Raise :exc:`Exception` otherwise.
    """
    try:
        if not input_string.strip():
            raise ValueError()
    except AttributeError as error:
        raise TypeError(error)

    return True