Merge pull request #460 from alibaba-damo-academy/dev_zc

zhifu gao

2023-05-05 e06317e9d0584086af2ea8c11baf822d71674c49

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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