SequenceLength - 11


  • name: SequenceLength (GitHub)

  • domain: main

  • since_version: 11

  • function: False

  • support_level: SupportType.COMMON

  • shape inference: True

This version of the operator has been available since version 11.


Produces a scalar(tensor of empty shape) containing the number of tensors in ‘input_sequence’.


  • input_sequence (heterogeneous) - S:

    Input sequence.


  • length (heterogeneous) - I:

    Length of input sequence. It must be a scalar(tensor of empty shape).

Type Constraints

  • S in ( seq(tensor(bool)), seq(tensor(complex128)), seq(tensor(complex64)), seq(tensor(double)), seq(tensor(float)), seq(tensor(float16)), seq(tensor(int16)), seq(tensor(int32)), seq(tensor(int64)), seq(tensor(int8)), seq(tensor(string)), seq(tensor(uint16)), seq(tensor(uint32)), seq(tensor(uint64)), seq(tensor(uint8)) ):

    Constrain to any tensor type.

  • I in ( tensor(int64) ):

    Constrain output to integral tensor. It must be a scalar(tensor of empty shape).