grpc onnx cpp first commit

dyyzhmm

2023-03-06 713cd5d128119c1494d1274c7addf1972d8aa4d0

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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