"shape inference for some operators failed, those operators will be assignd node.out_shape==None, refer to https://github.com/onnx/onnx/blob/master/docs/ShapeInference.md"
_logger.warning(
'shape inference for some operators failed, '
'those operators will be assignd node.out_shape==None, '
'refer to https://github.com/onnx/onnx/blob/master/docs/ShapeInference.md'