Merge pull request #341 from alibaba-damo-academy/dev_zly2

zhifu gao

2023-04-13 030043f768fa82c73e5decdf95f1016bf49b962a

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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