Merge pull request #220 from alibaba-damo-academy/dev_zly

hnluo

2023-03-13 c1e3cc62f90a8bd194126fc6561073916890e897

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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