[Optimization] support bladedisc fp16 optimization (#1790)

xiaowan0322

2024-06-06 9a9b474e7de7cc90d2ee124dc8d6c2cfa887c059

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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