Merge pull request #835 from alibaba-damo-academy/dev_lhn

hnluo

2023-08-11 4fd7f02b26083d9734dbfb28899f7ca708fb2e7d

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from abc import ABC
from abc import abstractmethod
from typing import Tuple
 
import torch
 
 
class AbsPostEncoder(torch.nn.Module, ABC):
    @abstractmethod
    def output_size(self) -> int:
        raise NotImplementedError
 
    @abstractmethod
    def forward(
        self, input: torch.Tensor, input_lengths: torch.Tensor
    ) -> Tuple[torch.Tensor, torch.Tensor]:
        raise NotImplementedError