add cif_v1 and cif_export

zhuangzhong

2024-06-07 e700341244b02eb4116ba96d1b7faf42375dbe57

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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