Merge pull request #324 from alibaba-damo-academy/dev_lhn2

Lizerui9926

2023-04-03 cbbb3007436bf7cefa45af9a5aad60c696da9732

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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