Fix TypeError formatting to reflect the true error (Fixes #2157)

cloudtools · Aug 12, 2023 · c52e9eb · c52e9eb
1 parent b241a05
commit c52e9eb
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/troposphere/compat.py b/troposphere/compat.py
@@ -18,8 +18,9 @@
 def validate_policytype(policy):
     if not isinstance(policy, policytypes):
         raise TypeError(
-            "Invalid policy type: is %s, expected %s" % type(policy), policytypes
+            f"Invalid policy type: is {type(policy)}, expected {policytypes}"
         )
+
     return policy