Minor changes addressing PR review issues

1 files changed, 12 insertions, 1 deletions

diff --git a/jsonschema/exceptions.py b/jsonschema/exceptions.py
index c6ef8c1..d10f246 100644
--- a/jsonschema/exceptions.py
+++ b/jsonschema/exceptions.py
@@ -141,7 +141,18 @@ class RefResolutionError(Exception):
 
 
 class UndefinedTypeCheck(Exception):
-    pass
+    def __init__(self, type):
+        self.type = type
+
+    def __unicode__(self):
+        return "Type %r is unknown to this type checker" % self.type
+
+    if PY3:
+        __str__ = __unicode__
+    else:
+        def __str__(self):
+            return unicode(self).encode("utf-8")
+
 
 class UnknownType(Exception):
     def __init__(self, type, instance, schema):