Merge pull request #461 from alibaba-damo-academy/dev_sx

zhifu gao

2023-05-05 e7c379d0a09b34b651b824863ca8e7972b515c71

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from abc import ABC
from abc import abstractmethod
from typing import Iterator
 
 
class AbsIterFactory(ABC):
    @abstractmethod
    def build_iter(self, epoch: int, shuffle: bool = None) -> Iterator:
        raise NotImplementedError