Merge branch 'alibaba-damo-academy:main' into add-offline-websocket-srv

zhaomingwork

2023-04-28 7a2ca2cca4e164e8c5ed10f381b6407751603b71

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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