[Python] add method vectorToEigenArray in python-definition

python/curves/python_definitions.h

@@ -45,5 +45,16 @@ T_Point vectorFromEigenVector(const PointList& vector) {
   }
   return res;
 }
+
+template <typename T_point, typename PointList>
+PointList vectorToEigenArray(const T_point& vect) {
+  const size_t nCols = vect.size();
+  const size_t nRows = vect[0].rows();
+  PointList res(nRows,nCols);
+  for (size_t i = 0; i < vect.size(); ++i) {
+    res.block(0,i,nRows,1) = vect[i];
+  }
+  return res;
+}
 }  // namespace curves
 #endif  //_DEFINITION_PYTHON_BINDINGS