PyObject * PyOCIO_MatrixTransform_setValue(PyObject * self, PyObject * args)
 {
     OCIO_PYTRY_ENTER()
     PyObject* pymatrix = 0;
     PyObject* pyoffset = 0;
     if (!PyArg_ParseTuple(args, "OO:setValue",
         &pymatrix, &pyoffset)) return NULL;
     std::vector<float> matrix;
     std::vector<float> offset;
     if(!FillFloatVectorFromPySequence(pymatrix, matrix) ||
         (matrix.size() != 16))
     {
         PyErr_SetString(PyExc_TypeError,
             "First argument must be a float array, size 16");
         return 0;
     }
     if(!FillFloatVectorFromPySequence(pyoffset, offset) ||
         (offset.size() != 4))
     {
         PyErr_SetString(PyExc_TypeError,
             "Second argument must be a float array, size 4");
         return 0;
     }
     MatrixTransformRcPtr transform = GetEditableMatrixTransform(self);
     transform->setValue(&matrix[0], &offset[0]);
     Py_RETURN_NONE;
     OCIO_PYTRY_EXIT(NULL)
 }
 PyObject * PyOCIO_AllocationTransform_setVars(PyObject * self, PyObject * args)
 {
     OCIO_PYTRY_ENTER()
     PyObject * pyvars = 0;
     if (!PyArg_ParseTuple(args,"O:setVars", &pyvars)) return NULL;
     std::vector<float> vars;
     if(!FillFloatVectorFromPySequence(pyvars, vars))
     {
         PyErr_SetString(PyExc_TypeError, "First argument must be a float array.");
         return 0;
     }
     AllocationTransformRcPtr transform = GetEditableAllocationTransform(self);
     if(!vars.empty()) transform->setVars(static_cast<int>(vars.size()), &vars[0]);
     Py_RETURN_NONE;
     OCIO_PYTRY_EXIT(NULL)
 }
 PyObject * PyOCIO_CDLTransform_setSOP(PyObject * self, PyObject * args)
 {
     OCIO_PYTRY_ENTER()
     PyObject* pyData = 0;
     if (!PyArg_ParseTuple(args, "O:setSOP", &pyData)) return NULL;
     CDLTransformRcPtr transform = GetEditableCDLTransform(self); 
     std::vector<float> data;
     if(!FillFloatVectorFromPySequence(pyData, data) || (data.size() != 9))
     {
     	PyErr_SetString(PyExc_TypeError, "First argument must be a float array, size 9");
         return 0;
     }
     transform->setSOP(&data[0]);    
     Py_RETURN_NONE;
     OCIO_PYTRY_EXIT(NULL)
 }
 PyObject * PyOCIO_MatrixTransform_Fit(PyObject * /*self*/, PyObject * args)
 {
     OCIO_PYTRY_ENTER()
     
     PyObject* pyoldmin = 0;
     PyObject* pyoldmax = 0;
     PyObject* pynewmin = 0;
     PyObject* pynewmax = 0;
     if (!PyArg_ParseTuple(args,"OOOO:Fit",
         &pyoldmin, &pyoldmax, &pynewmin, &pynewmax)) return NULL;
     
     std::vector<float> oldmin;
     if(!FillFloatVectorFromPySequence(pyoldmin, oldmin) ||
         (oldmin.size() != 4))
     {
         PyErr_SetString(PyExc_TypeError,
             "First argument must be a float array, size 4");
         return 0;
     }
     
     std::vector<float> oldmax;
     if(!FillFloatVectorFromPySequence(pyoldmax, oldmax) ||
         (oldmax.size() != 4))
     {
         PyErr_SetString(PyExc_TypeError,
             "Second argument must be a float array, size 4");
         return 0;
     }
     
     std::vector<float> newmin;
     if(!FillFloatVectorFromPySequence(pynewmin, newmin) ||
         (newmin.size() != 4))
     {
         PyErr_SetString(PyExc_TypeError,
             "Third argument must be a float array, size 4");
         return 0;
     }
     
     std::vector<float> newmax;
     if(!FillFloatVectorFromPySequence(pynewmax, newmax) ||
         (newmax.size() != 4))
     {
         PyErr_SetString(PyExc_TypeError,
             "Fourth argument must be a float array, size 4");
         return 0;
     }
     
     std::vector<float> matrix(16);
     std::vector<float> offset(4);
     MatrixTransform::Fit(&matrix[0], &offset[0],
                          &oldmin[0], &oldmax[0],
                          &newmin[0], &newmax[0]);
     PyObject* pymatrix = CreatePyListFromFloatVector(matrix);
     PyObject* pyoffset = CreatePyListFromFloatVector(offset);
     PyObject* pyreturnval = Py_BuildValue("(OO)", pymatrix, pyoffset);
     Py_DECREF(pymatrix);
     Py_DECREF(pyoffset);
     return pyreturnval;
     
     OCIO_PYTRY_EXIT(NULL)
 }