static PyObject *py_mod_bt2_exc_memory_error = NULL;
static PyObject *py_mod_bt2_exc_try_again_type = NULL;
static PyObject *py_mod_bt2_exc_stop_type = NULL;
static PyObject *py_mod_bt2_exc_memory_error = NULL;
static PyObject *py_mod_bt2_exc_try_again_type = NULL;
static PyObject *py_mod_bt2_exc_stop_type = NULL;