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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_preinit_encoders(encoders: List[encoder.Encoder]) -> List[Tuple[str, mx.init.Initializer]]: """ Get initializers from encoders. Some encoders might be initialized from pretrained models. :param encoders: List of encoders :return: The list of initializers """

    init = []  # type: List[Tuple[str, mx.init.Initializer]]
    for enc in encoders:
        if hasattr(enc, "get_initializers"):
            enc = cast(encoder_image.ImageLoadedCnnEncoder, enc)
            init.extend(enc.get_initializers())
    return init