Update README_zh.md (#1007)

yufan

2023-10-13 dc5b54b77d5aadde15cb0734ae6a5238b21aa78f

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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