`%(pathname)s` logging format from C extension

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1

Hi,

I have a C extension which does some logging using the built-in logging module. The root logger has been configured to include the %(pathname)s:%(lineno)d fields in the format.

The fields work fine when the logging is done from Python code. However, any log entries from the C extension show /usr/lib64/python3.13/logging/__init__.py:2205 for every logging entry.

The C extension uses the following code to get the root logger:

    logging_module = PyImport_ImportModule("vortex.lib.logging");
    if (!logging_module)
        goto fail;

    logging.logger = PyObject_CallMethod(logging_module, "getLogger", NULL);
    if (!logging.logger)
        goto fail;

    return 0;

The call to the logger methods is made with

    state = PyGILState_Ensure();
    if (!PyObject_CallMethod(logging.logger, log_methods[level], "(s)", msg_str))
        PyErr_Print();

    PyGILState_Release(state);

The log messages from the C extension are formatted correctly. It’s just that the value for the %(pathname)s:%(lineno)d fields is showing as a generic value.

Is there a way to make the log messages show correct values for those fields?