Merge pull request #482 from alibaba-damo-academy/dev_sx

zhifu gao

2023-05-10 5d41556d3968d2f9f48b64c0c08b9bfa5fbb323c

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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