Merge pull request #167 from alibaba-damo-academy/dev_lhn

zhifu gao

2023-03-01 5d4b0c39947ff220effb048b9c2d9db9bec5094d

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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