Merge pull request #857 from alibaba-damo-academy/dev_wjm_tmp

hnluo

2023-08-15 3a71c7a227ebd8b61995e2fb8ee0c3c25a8c19c4

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from abc import ABC
from abc import abstractmethod
from typing import Tuple
 
import torch
 
 
class AbsNormalize(torch.nn.Module, ABC):
    @abstractmethod
    def forward(
        self, input: torch.Tensor, input_lengths: torch.Tensor = None
    ) -> Tuple[torch.Tensor, torch.Tensor]:
        # return output, output_lengths
        raise NotImplementedError