Dev gzf exp (#1650)

zhifu gao

2024-04-23 61d631fb5b8e3154d824fe50f697b0303a2f73f3

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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