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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 media(self):
 """ Incooperate composite field's media. """

        media_list = []
        media_list.append(super(SuperFormMixin, self).media)
        for composite_name in self.composite_fields.keys():
            form = self.get_composite_field_value(composite_name)
            media_list.append(form.media)
        return reduce(lambda a, b: a + b, media_list)