GH-103899: Provide a hint when accidentally calling a module by brandtbucher · Pull Request #103900 · python/cpython

PyObject *name = PyModule_GetNameObject(callable);
PyObject *attr = NULL;
int suggestion = 0;

if (name != NULL) {
    int res = _PyObject_LookupAttr(callable, name, &attr);
    if (res > 0 && PyCallable_Check(attr)) {
        _PyErr_Format(tstate, PyExc_TypeError,
                      "'%.200s' object is not callable. "
                      "Did you mean: '%U.%U(...)'?",
                      Py_TYPE(callable)->tp_name, name, name);
        suggestion = 1;
    }
}
Py_XDECREF(attr);
Py_XDECREF(name);
if (suggestion == 0) {
    _PyErr_Format(tstate, PyExc_TypeError, "'%.200s' object is not callable",
                  Py_TYPE(callable)->tp_name);
}