NumCpp  2.10.1
A Templatized Header Only C++ Implementation of the Python NumPy Library
BoostInterface.hpp
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1 #pragma once
29 
30 #if defined(NUMCPP_INCLUDE_BOOST_PYTHON_INTERFACE) && !defined(NUMCPP_NO_USE_BOOST)
31 
32 #include <map>
33 #include <string>
34 
35 #include "boost/python.hpp"
36 #include "boost/python/numpy.hpp"
37 
39 #include "NumCpp/Core/Shape.hpp"
40 #include "NumCpp/NdArray.hpp"
42 
43 namespace nc
44 {
45  namespace boostPythonInterface
46  {
47  //============================================================================
54  template<typename dtype>
55  inline NdArray<dtype> boost2Nc(const boost::python::numpy::ndarray& inArray)
56  {
57  BoostNdarrayHelper<dtype> helper(inArray);
58  if (helper.numDimensions() > 2)
59  {
60  THROW_RUNTIME_ERROR("Can only convert 1 and 2 dimensional arrays.");
61  }
62 
63  Shape arrayShape;
64  if (helper.numDimensions() == 1)
65  {
66  arrayShape.rows = 1;
67  arrayShape.cols = static_cast<uint32>(helper.shape().front());
68 
69  NdArray<dtype> returnArray(arrayShape);
70  for (uint32 i = 0; i < arrayShape.size(); ++i)
71  {
72  returnArray[i] = helper(i);
73  }
74 
75  return returnArray;
76  }
77 
78  arrayShape.rows = static_cast<uint32>(helper.shape().front());
79  arrayShape.cols = static_cast<uint32>(helper.shape()[1]);
80 
81  NdArray<dtype> returnArray(arrayShape);
82  for (uint32 row = 0; row < arrayShape.rows; ++row)
83  {
84  for (uint32 col = 0; col < arrayShape.cols; ++col)
85  {
86  returnArray(row, col) = helper(row, col);
87  }
88  }
89 
90  return returnArray;
91  }
92 
93  //============================================================================
100  template<typename dtype>
101  inline boost::python::numpy::ndarray nc2Boost(const NdArray<dtype>& inArray)
102  {
103  const Shape inShape = inArray.shape();
104  boost::python::tuple shape = boost::python::make_tuple(inShape.rows, inShape.cols);
105  BoostNdarrayHelper<dtype> newNdArrayHelper(shape);
106 
107  for (uint32 row = 0; row < inShape.rows; ++row)
108  {
109  for (uint32 col = 0; col < inShape.cols; ++col)
110  {
111  newNdArrayHelper(row, col) = inArray(row, col);
112  }
113  }
114  return newNdArrayHelper.getArray();
115  }
116 
117  //============================================================================
124  template<typename T>
125  inline std::vector<T> list2vector(const boost::python::list& inList)
126  {
127  return std::vector<T>(boost::python::stl_input_iterator<T>(inList), boost::python::stl_input_iterator<T>());
128  }
129 
130  //============================================================================
137  template<typename T>
138  inline boost::python::list vector2list(std::vector<T>& inVector)
139  {
140  boost::python::list outList;
141  for (auto& value : inVector)
142  {
143  outList.append(value);
144  }
145 
146  return outList;
147  }
148 
149  //============================================================================
156  template<class Key, class Value>
157  inline boost::python::dict map2dict(const std::map<Key, Value>& inMap)
158  {
159  boost::python::dict dictionary;
160  for (auto& keyValue : inMap)
161  {
162  dictionary[keyValue.first] = keyValue.second;
163  }
164  return dictionary;
165  }
166  } // namespace boostPythonInterface
167 } // namespace nc
168 
169 #endif // #if defined(NUMCPP_INCLUDE_BOOST_PYTHON_INTERFACE) && !defined(NUMCPP_NO_USE_BOOST)
#define THROW_RUNTIME_ERROR(msg)
Definition: Error.hpp:40
Definition: Coordinate.hpp:45
Shape shape(const NdArray< dtype > &inArray) noexcept
Definition: Functions/Shape.hpp:42
std::uint32_t uint32
Definition: Types.hpp:40