Update SDK_advanced_guide_online_zh.md

Yabin Li

2023-08-17 71a1ca837e5edae751d688b2f5498a494a96c5af

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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