python - Cython __pyx_r may be used uninitialized in this function -

i trying utilize cython provide wrapper c++ utilities. 1 such function trying make accessible accessor returns enum based on file type.

here how re-define function in cython:

cdef extern "reader.h" namespace "magic_number":    enum mcr_magic_number_t:                                                                                     mdi = 0                                                                                                   eot                                                                                                       rv                                                                                                        unknown   

and in reader.pxd file have

cpdef mcr_magic_number_t magic_number(self) 

and in reader.pyx file have

cpdef mcr_magic_number_t magic_number(self):                """                                               :return: magic_number enum                           :rtype: mcr_magic_number_t                               """                                                      return self.thisptr.magic_number()  

now, when go compile this, warning

warning: ‘__pyx_r’ may used uninitialized in function

anyone know how best around this? tried searching solutions on google got pages of other people reporting same __pyx_r warning. maybe there way set default value or make sure initialized within cython?

try checking self.thisptr non-null value:

if <void*>self.thisptr != null:     return self.thisptr.magic_number()