change lm task name

wucong.lyb

2023-02-17 6f9c735c7f3cd690a375da4696ea3a161ea72e27

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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