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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_context(self, name, value, attrs):
 """ Some widgets require a modified rendering context, if they contain angular directives. """

        context = super(NgWidgetMixin, self).get_context(name, value, attrs)
        if callable(getattr(self._field, 'update_widget_rendering_context', None)):
            self._field.update_widget_rendering_context(context)
        return context