def __init__(self):
        """
        High level Python API to build a tree ensemble model for Core ML.
        """
        # Set inputs and outputs
        spec = _proto.Model_pb2.Model()
        spec.specificationVersion = _SPECIFICATION_VERSION

        # Save the spec in the protobuf
        self.spec = spec

        High level Python API to build a tree ensemble model for Core ML.
        
coremltools/models/tree_ensemble.py