Improve error message for In() and NotIn() (#425)

* Update validators.py * Update In and NotIn validator error message
alecthomas · Nov 18, 2020 · ffa09b4 · ffa09b4
1 parent 67adedd
commit ffa09b4
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/voluptuous/validators.py b/voluptuous/validators.py
@@ -737,7 +737,8 @@ def __call__(self, v):
         except TypeError:
             check = True
         if check:
-            raise InInvalid(self.msg or 'value is not allowed')
+            raise InInvalid(self.msg or 
+                            'value must be one of {}'.format(self.container))
         return v
 
     def __repr__(self):
@@ -757,7 +758,8 @@ def __call__(self, v):
         except TypeError:
             check = True
         if check:
-            raise NotInInvalid(self.msg or 'value is not allowed')
+            raise NotInInvalid(self.msg or 
+                               'value must not be one of {}'.format(self.container))
         return v
 
     def __repr__(self):