text: #ifndef PYDIA_ERROR_H
  #define PYDIA_ERROR_H
  
  #include <Python.h>
  #include <glib.h>
  
  typedef struct {
      PyObject_HEAD
      GString* str;
  } PyDiaError;
  
  extern PyTypeObject PyDiaError_Type;
  
  PyObject* PyDiaError_New (const char* s, gboolean unbuffered);
  void _pyerror_report_last (gboolean popup, const char* fn, const char* file, int line);
  
  #define ON_RES(r,popup) \
  if (!r) { \
    _pyerror_report_last (popup, G_GNUC_PRETTY_FUNCTION, __FILE__, __LINE__); \
  } \
  else \
    Py_DECREF (r)
        
  #endif
  