update streaming paraformer text process

haoneng.lhn

2023-05-05 7987a7b6fade65a7fd2a70b661c3818862a21965

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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