diff --git a/index.html b/index.html
index 62e6269..c45136c 100644
--- a/index.html
+++ b/index.html
@@ -44,8 +44,7 @@ <h1>Loading...</h1>
 
         <section class="pyscript">
             we define a function f as <br />
-            def f(l):
-                  return {'median': statistics.median(l), 'range': l.max()-l.min()}
+            f = lambda l: {'median': statistics.median(l), 'range': l.max()-l.min()}
             <script type="py">
                 from pyscript import display
                 import statistics