BoostInterface.hpp

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#pragma once
 
#if defined(NUMCPP_INCLUDE_BOOST_PYTHON_INTERFACE) && !defined(NUMCPP_NO_USE_BOOST)
 
#include <map>
#include <string>
 
#include "boost/python.hpp"
#include "boost/python/numpy.hpp"
 
#include "NumCpp/Core/Internal/Error.hpp"
#include "NumCpp/Core/Shape.hpp"
#include "NumCpp/NdArray.hpp"
#include "NumCpp/PythonInterface/BoostNumpyNdarrayHelper.hpp"
 
namespace nc
{
    namespace boostPythonInterface
    {
        //============================================================================
        template<typename dtype>
        inline NdArray<dtype> boost2Nc(const boost::python::numpy::ndarray& inArray)
        {
            BoostNdarrayHelper<dtype> helper(inArray);
            if (helper.numDimensions() > 2)
            {
                THROW_RUNTIME_ERROR("Can only convert 1 and 2 dimensional arrays.");
            }
 
            Shape arrayShape;
            if (helper.numDimensions() == 1)
            {
                arrayShape.rows = 1;
                arrayShape.cols = static_cast<uint32>(helper.shape().front());
 
                NdArray<dtype> returnArray(arrayShape);
                for (uint32 i = 0; i < arrayShape.size(); ++i)
                {
                    returnArray[i] = helper(i);
                }
 
                return returnArray;
            }
 
            arrayShape.rows = static_cast<uint32>(helper.shape().front());
            arrayShape.cols = static_cast<uint32>(helper.shape()[1]);
 
            NdArray<dtype> returnArray(arrayShape);
            for (uint32 row = 0; row < arrayShape.rows; ++row)
            {
                for (uint32 col = 0; col < arrayShape.cols; ++col)
                {
                    returnArray(row, col) = helper(row, col);
                }
            }
 
            return returnArray;
        }
 
        //============================================================================
        template<typename dtype>
        inline boost::python::numpy::ndarray nc2Boost(const NdArray<dtype>& inArray)
        {
            const Shape               inShape = inArray.shape();
            boost::python::tuple      shape   = boost::python::make_tuple(inShape.rows, inShape.cols);
            BoostNdarrayHelper<dtype> newNdArrayHelper(shape);
 
            for (uint32 row = 0; row < inShape.rows; ++row)
            {
                for (uint32 col = 0; col < inShape.cols; ++col)
                {
                    newNdArrayHelper(row, col) = inArray(row, col);
                }
            }
            return newNdArrayHelper.getArray();
        }
 
        //============================================================================
        template<typename T>
        inline std::vector<T> list2vector(const boost::python::list& inList)
        {
            return std::vector<T>(boost::python::stl_input_iterator<T>(inList), boost::python::stl_input_iterator<T>());
        }
 
        //============================================================================
        template<typename T>
        inline boost::python::list vector2list(std::vector<T>& inVector)
        {
            boost::python::list outList;
            for (auto& value : inVector)
            {
                outList.append(value);
            }
 
            return outList;
        }
 
        //============================================================================
        template<class Key, class Value>
        inline boost::python::dict map2dict(const std::map<Key, Value>& inMap)
        {
            boost::python::dict dictionary;
            for (auto& keyValue : inMap)
            {
                dictionary[keyValue.first] = keyValue.second;
            }
            return dictionary;
        }
    } // namespace boostPythonInterface
} // namespace nc
 
#endif // #if defined(NUMCPP_INCLUDE_BOOST_PYTHON_INTERFACE) && !defined(NUMCPP_NO_USE_BOOST)