diff -Nurp net-snmp-5.9.3-orig/python/netsnmp/client_intf.c net-snmp-5.9.3/python/netsnmp/client_intf.c
--- net-snmp-5.9.3-orig/python/netsnmp/client_intf.c	2022-07-13 23:14:14.000000000 +0200
+++ net-snmp-5.9.3/python/netsnmp/client_intf.c	2022-09-23 16:21:44.040588303 +0200
@@ -872,9 +872,16 @@ py_netsnmp_attr_string(PyObject *obj, co
   if (obj && attr_name && PyObject_HasAttrString(obj, attr_name)) {
     PyObject *attr = PyObject_GetAttrString(obj, attr_name);
     if (attr) {
+#if PY_MAJOR_VERSION >= 3
       *val = PyUnicode_AsUTF8AndSize(attr, len);
       Py_DECREF(attr);
       return 0;
+#else
+      int retval;
+      retval = PyBytes_AsStringAndSize(attr, val, len);
+      Py_DECREF(attr);
+      return retval;
+#endif
     }
   }