Merge pull request #322 from alibaba-damo-academy/dev_wjm2

zhifu gao

2023-03-31 2a69e1984b143cd9e5f9c1d05071a7ef27f27a46

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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