Add is_leap function to check leap years

Author: rajeshsola

myleap.py

@@ -0,0 +1,6 @@
+"""A simple module."""
+
+
+def is_leap(yy):
+    """Functin to check given year is leap or not."""
+    return yy % 400 == 0  or (yy % 4 == 0 and yy % 100 != 0)