Merge pull request #442 from alibaba-damo-academy/dev_lhn

hnluo

2023-04-28 ebabb37754d184ba30ba2f016f44e5f82138c3c3

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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