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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 i18n_javascript(self, request):
 """ Displays the i18n JavaScript that the Django admin requires. This takes into account the USE_I18N setting. If it's set to False, the generated JavaScript will be leaner and faster. """

        if settings.USE_I18N:
            from django.views.i18n import javascript_catalog
        else:
            from django.views.i18n import null_javascript_catalog as javascript_catalog
        return javascript_catalog(request, packages=['media_tree'])