Python django.forms.widgets 模块，Widget() 实例源码

def test_correct_error_thrown(self):
        from django.forms.widgets import Widget
        class NotARealWidget(Widget):
            def __repr__(self):
                return "NotARealWidget"

        class TestForm(forms.Form):
            not_a_real = forms.CharField(widget=NotARealWidget)

        expected = 'Could not find component "NotARealWidget"'
        with self.assertRaises(KeyError, msg=expected) as context:
            schema = Schema().render(TestForm(data={}))