| Given DATA tensor of rank r >= 1, and LENGTHS
| tensor of rank 1, pad each segment in DATA with
| value, so that each segment’s length is
| target_length.
|
| If will throw, if there is segment of length
| larger than target_length.
|
| Example:
| DATA = [
| [2.3, 3.4],
| [4.5, 5.7],
| [6.8, 7.9],
| ]
| LENGTHS = [0, 1, 1, 1]
| and target_length = 2, padding value = -1.0
| OUTPUT = [
| [-1.0, -1.0],
| [-1.0, -1.0],
| [2.3, 3.4],
| [-1.0, -1.0],
| [4.5, 5.7],
| [-1.0, -1.0],
| [6.8, 7.9],
| [-1.0, -1.0],
| ]