Get info about inputs and outputs of onnx-model - script pour MetaTrader 5

Create model from mnist.onnx with debug logs
ONNX: Creating and using per session threadpools since use_per_session_threads_ is true
ONNX: Dynamic block base set to 0
ONNX: Initializing session.
ONNX: Adding default CPU execution provider.
ONNX: Removing initializer 'Parameter6'. It is no longer used by any node.
ONNX: Removing initializer 'Parameter88'. It is no longer used by any node.
ONNX: Total shared scalar initializer count: 0
ONNX: Removing initializer 'Parameter193_reshape1_shape'. It is no longer used by any node.
ONNX: Removing initializer 'Parameter193'. It is no longer used by any node.
ONNX: Total fused reshape node count: 0
ONNX: Total shared scalar initializer count: 0
ONNX: Total fused reshape node count: 0
ONNX: Removing initializer 'Parameter5'. It is no longer used by any node.
ONNX: Removing initializer 'Parameter87'. It is no longer used by any node.
ONNX: Use DeviceBasedPartition as default
ONNX: Saving initialized tensors.
ONNX: Done saving initialized tensors
ONNX: Session successfully initialized.
model has 1 input(s)
0 input name is Input3
   type ONNX_TYPE_TENSOR
   data type ONNX_DATA_TYPE_FLOAT
   shape [1, 1, 28, 28]
   shape of input data can be reduced to [28, 28]
model has 1 output(s)
0 output name is Plus214_Output_0
   type ONNX_TYPE_TENSOR
   data type ONNX_DATA_TYPE_FLOAT
   shape [1, 10]
   shape of output data can be reduced to [10]