Update readme.md

zhifu gao

2023-06-27 5e9ae0f1f913a36cab03eabb776b50557d81f50f

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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