diff --git a/examples/docs_snippets/docs_snippets/intro_tutorial/basics/e02_solids/inputs.py b/examples/docs_snippets/docs_snippets/intro_tutorial/basics/e02_solids/inputs.py
--- a/examples/docs_snippets/docs_snippets/intro_tutorial/basics/e02_solids/inputs.py
+++ b/examples/docs_snippets/docs_snippets/intro_tutorial/basics/e02_solids/inputs.py
@@ -17,7 +17,9 @@
 
 @solid
 def sort_by_calories(context, cereals):
-    sorted_cereals = sorted(cereals, key=lambda cereal: cereal["calories"])
+    sorted_cereals = sorted(
+        cereals, key=lambda cereal: int(cereal["calories"])
+    )
     context.log.info(
         "Least caloric cereal: {least_caloric}".format(
             least_caloric=sorted_cereals[0]["name"]