Update README.md

zhifu gao

2023-06-18 a1fee4e8adf80634ff11b5a597188f95202b214f

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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