diff --git a/python_apps/pypo/pure.py b/python_apps/pypo/pure.py
new file mode 100644
index 000000000..8b004ae6d
--- /dev/null
+++ b/python_apps/pypo/pure.py
@@ -0,0 +1,7 @@
+import re
+
+
+def version_cmp(version1, version2):
+    def normalize(v):
+        return [int(x) for x in re.sub(r'(\.0+)*$','', v).split(".")]
+    return cmp(normalize(version1), normalize(version2))