Merge pull request #787 from alibaba-damo-academy/dev_lhn

hnluo

2023-07-28 c64d4b25e2d60981953dc4b2e984cb90410d5c7b

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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