def is_new_session(handler_input):
    # type: (HandlerInput) -> bool
    """Return if the session is new for the input request.

    The method retrieves the ``new`` value from the input request's
    session, which indicates if it's a new session or not. The
    :py:class:`ask_sdk_model.session.Session` is only included on all
    standard requests except ``AudioPlayer``, ``VideoApp`` and
    ``PlaybackController`` requests. More information can be found here :
    https://developer.amazon.com/docs/custom-skills/request-and-response-json-reference.html#session-object

    A :py:class:`TypeError` is raised if the input request doesn't have
    the ``session`` information.

    :param handler_input: The handler input instance that is generally
        passed in the sdk's request and exception components
    :type handler_input: ask_sdk_core.handler_input.HandlerInput
    :return: Boolean if the session is new for the input request
    :rtype: bool
    :raises: TypeError if the input request doesn't have a session
    """
    session = handler_input.request_envelope.session

    if session is not None:
        return session.new

    raise TypeError("The provided request doesn't have a session")
Return if the session is new for the input request.

    The method retrieves the ``new`` value from the input request's
    session, which indicates if it's a new session or not. The
    :py:class:`ask_sdk_model.session.Session` is only included on all
    standard requests except ``AudioPlayer``, ``VideoApp`` and
    ``PlaybackController`` requests. More information can be found here :
    https://developer.amazon.com/docs/custom-skills/request-and-response-json-reference.html#session-object

    A :py:class:`TypeError` is raised if the input request doesn't have
    the ``session`` information.

    :param handler_input: The handler input instance that is generally
        passed in the sdk's request and exception components
    :type handler_input: ask_sdk_core.handler_input.HandlerInput
    :return: Boolean if the session is new for the input request
    :rtype: bool
    :raises: TypeError if the input request doesn't have a session