Merge pull request #280 from alibaba-damo-academy/dev_dzh

zhifu gao

2023-03-22 8d6bd75d7226c1e03d44243895ffc73f45e4a262

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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