| # -*- coding: utf-8 -*- | |
| # Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. (MPG) is | |
| # holder of all proprietary rights on this computer program. | |
| # You can only use this computer program if you have closed | |
| # a license agreement with MPG or you get the right to use the computer | |
| # program from someone who is authorized to grant you that right. | |
| # Any use of the computer program without a valid license is prohibited and | |
| # liable to prosecution. | |
| # | |
| # Copyright©2020 Max-Planck-Gesellschaft zur Förderung | |
| # der Wissenschaften e.V. (MPG). acting on behalf of its Max Planck Institute | |
| # for Intelligent Systems. All rights reserved. | |
| # | |
| # Contact: [email protected] | |
| from typing import List, Dict | |
| import torch | |
| from torch import Tensor | |
| def lengths_to_mask(lengths: List[int], device: torch.device) -> Tensor: | |
| lengths = torch.tensor(lengths, device=device) | |
| max_len = max(lengths) | |
| mask = torch.arange(max_len, device=device).expand(len(lengths), max_len) < lengths.unsqueeze(1) | |
| return mask | |