interface is working, but with some issues

src/__init__.py

src/descriptor_identifier/SISSORegressor.cpp

src/descriptor_identifier/SISSORegressor.hpp

src/feature_creation/feature_space/FeatureSpace.cpp

src/feature_creation/feature_space/FeatureSpace.hpp

src/feature_creation/node/FeatureNode.cpp

src/feature_creation/node/FeatureNode.hpp

src/feature_creation/node/ModelNode.cpp

src/feature_creation/node/Node.cpp

src/feature_creation/node/Node.hpp

src/feature_creation/node/operator_nodes/OperatorNode.hpp

...ator_nodes/allowed_operator_nodes/absolute_difference.cpp

.../operator_nodes/allowed_operator_nodes/absolute_value.cpp

...eation/node/operator_nodes/allowed_operator_nodes/add.cpp

...eation/node/operator_nodes/allowed_operator_nodes/cos.cpp

...ation/node/operator_nodes/allowed_operator_nodes/cube.cpp

.../node/operator_nodes/allowed_operator_nodes/cube_root.cpp

...ion/node/operator_nodes/allowed_operator_nodes/divide.cpp

...ode/operator_nodes/allowed_operator_nodes/exponential.cpp

...on/node/operator_nodes/allowed_operator_nodes/inverse.cpp