Merge pull request #466 from zhaomingwork/fix_bug_for_python_websocket

zhifu gao

2023-05-06 b639e136b4a37400e569fbd0e64dc5aed066ce33

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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