Say goodbye to the previous and tedious way to define a widget in a model form:

class FooForm(forms.ModelForm):
     def __init__(self, *args, **kwargs):
         super(FooForm, self).__init__(*args, **kwargs)
         self.fields['description'].widget = Textarea(attrs={'cols': 80,
'rows': 20})

Now, after [12194] commit is easier and cleaner, without having to redefine the __init__ method:

class FooForm(forms.ModelForm):
     class Meta:
         widgets = {
              'description': Textarea(attrs={'cols': 80, 'rows': 20}),
         }