update with main (#1783)

zhifu gao

2024-06-04 3b0526e7be3565c42007313b90a018a2f8c8dff1

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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