Create udf.py

Author: lmangani

examples/udf.py

@@ -0,0 +1,10 @@
+#!/usr/bin/env python
+
+from chdb.udf import chdb_udf
+from chdb import query
+
+@chdb_udf()
+def sum_udf(lhs, rhs):
+    return int(lhs) + int(rhs)
+
+print(query("select sum_udf(12,22)"))