updated for version 7.3.583
Problem:    PyObject_NextNotImplemented is not defined before Python 2.7.
            (Danek Duvall)
Solution:   Add #ifdefs.
diff --git a/src/version.c b/src/version.c
index 30583f7..f9d2eda 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    583,
+/**/
     582,
 /**/
     581,