

In [68]:

    
import Part
class MyFeature(Part.BSplineSurface):
    pass









    



---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-68-567b8dcd0a12> in <module>()
      1 import Part
----> 2 class MyFeature(Part.BSplineSurface):
      3     pass

TypeError: Error when calling the metaclass bases
    type 'Part.GeomBSplineSurface' is not an acceptable base type



In [66]:

    
import FreeCAD as App
class MyVector(App.Rotation):
    pass









    



---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-66-8d4a3265a879> in <module>()
      1 import FreeCAD as App
----> 2 class MyVector(App.Rotation):
      3     pass

TypeError: Error when calling the metaclass bases
    type 'Base.Rotation' is not an acceptable base type

C++ Subclass Problem



In [2]:

    
import eigen
class MyEigenVector(eigen.vector3):
    def size(self):
        return 4



In [3]:

    
a = MyEigenVector([1,2,3])
b = eigen.vector3([1,2,3])



In [11]:

    
a.size()









    Out[11]:





4



In [5]:

    
b.size()









    Out[5]:





3L



In [7]:

    
len(a)









    Out[7]:





3



In [8]:

    
len(b)









    Out[8]:





3

PROBLEM: eigen.vector3 (python) is the wrapped Eigen::Vector3d (c++). The method "size" calls the method "size" of the c++ object. len also calls the c++ method size. But overwriting the method size won't change the result of len.



In [ ]: