Merge pull request #289 from alibaba-damo-academy/dev_gzf

zhifu gao

2023-03-23 8dcb5993244cde7eade0b5363865af6b8f6b768a

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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