python - How to enable Swig to emit C++ super class -

i try use overrides functions in python, part of cpp class.

class  {      public:       int func() { return 0; };       a(); };  class  b : { public:   b();   ~b(); }; 

i use following command generate swig python file

swig  -python -fvirtual -modern -keyword -w511 -module a_swig -outdir . -c++  -i. a_swig.i 

but see python file being generated:

class a(object):  thisown = _swig_property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc='the membership flag')  __repr__ = _swig_repr   def func(self):     return _iris_swig.a_func(self)   def __init__(self):     = _a_swig.new_a()     try:         self.this.append(this)     except __builtin__.exception:         self.this =  __swig_destroy__ = _a_swig.delete_a  __del__ = lambda self: none  a_swigregister = _a_swig.a_swigregister a_swigregister(a)  class b(object):   thisown = _swig_property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc='the membership flag') __repr__ = _swig_repr    def __init__(self, *args, **kwargs):     = _a_swig.new_b(*args, **kwargs)     try:         self.this.append(this)     except __builtin__.exception:         self.this =   __swig_destroy__ = _iris_swig.delete_b   __del__ = lambda self: none packet_header_iris_swigregister = _iris_swig.packet_header_iris_swigregister packet_header_iris_swigregister(packet_header_iris) 

i want see b being extended a, can use b.func() in python

class b (a): ... 

is there i'm missing?

class b privately inherits a, swig can't represent in python. change public inheritance , see relationship you're hoping for.