yowstack.py 文件源码

def _construct(self):
        logger.debug("Initializing stack")
        for s in self.__stack:
            if type(s) is tuple:
                logger.warn("Implicit declaration of parallel layers in a tuple is deprecated, pass a YowParallelLayer instead")
                inst = YowParallelLayer(s)
            else:
                if inspect.isclass(s):
                    if issubclass(s, YowLayer):
                        inst = s()
                    else:
                        raise ValueError("Stack must contain only subclasses of YowLayer")
                elif issubclass(s.__class__, YowLayer):
                        inst = s
                else:
                    raise ValueError("Stack must contain only subclasses of YowLayer")
                #inst = s()
            logger.debug("Constructed %s" % inst)
            inst.setStack(self)
            self.__stackInstances.append(inst)

        for i in range(0, len(self.__stackInstances)):
            upperLayer = self.__stackInstances[i + 1] if (i + 1) < len(self.__stackInstances) else None
            lowerLayer = self.__stackInstances[i - 1] if i > 0 else None
            self.__stackInstances[i].setLayers(upperLayer, lowerLayer)