Remove types_msg which implements really old draft-3 behavior.

Since then, types aren't objects, they're just strings.

This just wastes time catching exceptions for newer drafts.

jsonschema/_legacy_validators.py

@@ -193,8 +193,15 @@ def type_draft3(validator, types, instance, schema):
             if validator.is_type(instance, type):
                 return
     else:
+        reprs = []
+        for type in types:
+            try:
+                reprs.append(repr(type["name"]))
+            except Exception:
+                reprs.append(repr(type))
         yield ValidationError(
-            _utils.types_msg(instance, types), context=all_errors,
+            f"{instance!r} is not of type {', '.join(reprs)}",
+            context=all_errors,
         )
 
 

jsonschema/_utils.py

@@ -120,25 +120,6 @@ def extras_msg(extras):
     return ", ".join(repr(extra) for extra in extras), verb
 
 
-def types_msg(instance, types):
-    """
-    Create an error message for a failure to match the given types.
-
-    If the ``instance`` is an object and contains a ``name`` property, it will
-    be considered to be a description of that object and used as its type.
-
-    Otherwise the message is simply the reprs of the given ``types``.
-    """
-
-    reprs = []
-    for type in types:
-        try:
-            reprs.append(repr(type["name"]))
-        except Exception:
-            reprs.append(repr(type))
-    return f"{instance!r} is not of type {', '.join(reprs)}"
-
-
 def flatten(suitable_for_isinstance):
     """
     isinstance() can accept a bunch of really annoying different types:

jsonschema/_validators.py

@@ -9,7 +9,6 @@
     find_additional_properties,
     find_evaluated_item_indexes_by_schema,
     find_evaluated_property_keys_by_schema,
-    types_msg,
     unbool,
     uniq,
 )
@@ -356,7 +355,8 @@ def type(validator, types, instance, schema):
     types = ensure_list(types)
 
     if not any(validator.is_type(instance, type) for type in types):
-        yield ValidationError(types_msg(instance, types))
+        reprs = ", ".join(repr(type) for type in types)
+        yield ValidationError(f"{instance!r} is not of type {reprs}")
 
 
 def properties(validator, properties, instance, schema):