Merge pull request #367 from alibaba-damo-academy/dev_lhn2

hnluo

2023-04-17 24f73665e2d8ea8e4de2fe4f900bc539d7f7b989

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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