SystemError: <method-wrapper '__getattribute__' of EnumMeta object

[sciloop]

Hi,
first post here.

This is a thread about an python error I cannot resolve.
I'm primarily a c++ programmer (python beginner) and have to access python via pybind11.
Actually, all was fine until I changed my OS from Win10 to Win11 (this is the only change I am aware of in the last months).
The error occurs when I try to import other packages (numpy in this case). I made tests where I simply imported a module which imports another module. This worked fine.

For numpy, I get the following exception message:

Error:
'SystemError: <method-wrapper '__getattribute__' of EnumMeta object at 0x0000026950F06650> returned a result with an exception set

At:
  C:\Users\rammn\AppData\Local\Programs\Python\Python310\Lib\enum.py(462): __repr__
  C:\Users\rammn\AppData\Local\Programs\Python\Python310\Lib\enum.py(648): _find_new_
  C:\Users\rammn\AppData\Local\Programs\Python\Python310\Lib\enum.py(192): __new__
  C:\Users\rammn\AppData\Local\Programs\Python\Python310\Lib\enum.py(807): <module>
  <frozen importlib._bootstrap>(241): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(883): exec_module
  <frozen importlib._bootstrap>(703): _load_unlocked
  <frozen importlib._bootstrap>(1006): _find_and_load_unlocked
  <frozen importlib._bootstrap>(1027): _find_and_load
  C:\Users\rammn\AppData\Local\Programs\Python\Python310\Lib\site-packages\numpy\_globals.py(21): <module>
  <frozen importlib._bootstrap>(241): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(883): exec_module
  <frozen importlib._bootstrap>(703): _load_unlocked
  <frozen importlib._bootstrap>(1006): _find_and_load_unlocked
  <frozen importlib._bootstrap>(1027): _find_and_load
  C:\Users\rammn\AppData\Local\Programs\Python\Python310\Lib\site-packages\numpy\__init__.py(112): <module>
  <frozen importlib._bootstrap>(241): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(883): exec_module
  <frozen importlib._bootstrap>(703): _load_unlocked
  <frozen importlib._bootstrap>(1006): _find_and_load_unlocked
  <frozen importlib._bootstrap>(1027): _find_and_load
  C:\Users\rammn\AppData\Local\Programs\Python\Python310\Lib\site-packages\myOwnPythonFileImportingNumpy.py(38): <module>
  <frozen importlib._bootstrap>(241): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(883): exec_module
  <frozen importlib._bootstrap>(703): _load_unlocked
  <frozen importlib._bootstrap>(1006): _find_and_load_unlocked
  <frozen importlib._bootstrap>(1027): _find_and_load

The online docs tell me to contact the responsible developer (which would be somebody from CPython), but I have honestly no idea if and how I should do that.

exception SystemError
Raised when the interpreter finds an internal error, but the situation does not look so serious to cause it to abandon all hope. The associated value is a string indicating what went wrong (in low-level terms).
You should report this to the author or maintainer of your Python interpreter

I tried to find the source for the error in the cpython source code. But the nearest I got so far is the creation of the error message itself:

_PyErr_FormatFromCauseTstate( tstate, PyExc_SystemError, "%R returned a result with an exception set", callable);

in '_Py_CheckFunctionResult'
And I don't understand whats wrond with '__repr__'

May anyone point me to the right direction?
Many thanks!

[deanhystad]

Post the code that is generating this error. Looks like you messed up defining an enum.

[sciloop]

I haven't changed the default python modules ('enum.py'/'bootstrap.py'/'etc')
What I do is I import my own python module (using c), which in turn imports, for example, numpy:

 c : PyObject* obj = PyImport_ImportModule("myPythonModule");

Even if 'myPythonModule' has in it only the 'import numpy', I get the errors I mentioned above.

[deanhystad]

Do you have any problems running Python without trying to import your module? My guess is you messed up binding to your C code, but I would first verify that you don't have any problems with the Python setup on your computer.

[sciloop]

deanhystad,

I followed your suggestion to check whether I messed up python...
I have no idea why this happend, but placing the default function for printing out information of a PyObject

PyObject_Print(ob, stdout, Py_PRINT_RAW);

throughout my code somehow resulted in the 'enum' error.
However, without those print statements, I find myself back in the initial situation of cpython never returning.
(I checked numpy functionality using the interpreter (same python.exe) and all worked fine.)

Let me write down how far I came now when trying to import numpy.
These are the last steps before I could not get any further:

in the file 'call.c'' in

PyObject* _PyObject_MakeTpCall( PyThreadState *tstate, PyObject *callable, PyObject *const *args, Py_ssize_t nargs, PyObject *keywords)

'PyObject_Print' for 'callable' gives '<class 'numpy.longdouble'>'

Some lines further down a function pointer names 'call' is created:

ternaryfunc call = (((PyObject*)(callable))->ob_type)->tp_call;

When 'call' is then executed, the function 'type_call' is called (in 'typeobject.c')

static PyObject* type_call(PyTypeObject *type, PyObject *args, PyObject *kwds)

The 'PyTypeObject' paramater gives us:

PyTypeObject tp_name : 'numpy.longdouble'
PyTypeObject tp_doc : 'Extended-precision floating-point number type, compatible with C
long double but not necessarily with IEEE 754 quadruple-precision.

:Character code: 'g'
:Alias: numpy.longfloat'

Then, another function pointer, which already points to an unknown function is used:

obj = type->tp_new(type, args, kwds);

I tried to find every function to which 'tp_new' could point to and inserted printf-statements, but non of these functions got called...

...and from this function call, python never returns.

So, thats how far I came..and I still have no idea what I can do to solve the problem...
Do you have an idea?

thanks!