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-rw-r--r--django/forms/widgets.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/forms/widgets.py b/django/forms/widgets.py
index 26f8d312e4..ea701bdcf9 100644
--- a/django/forms/widgets.py
+++ b/django/forms/widgets.py
@@ -190,7 +190,7 @@ class Widget(six.with_metaclass(MediaDefiningClass)):
The 'value' given is not guaranteed to be valid input, so subclass
implementations should program defensively.
"""
- raise NotImplementedError
+ raise NotImplementedError('subclasses of Widget must provide a render() method')
def build_attrs(self, extra_attrs=None, **kwargs):
"Helper function for building an attribute dictionary."