def csrf_response_exempt(view_func):
 warnings.warn('csrf_response_exempt is deprecated. It no longer performs a function, and calls to it can be removed.', DeprecationWarning)
 return view_func

def csrf_response_exempt ( view_func ) : warnings . warn ( 'csrf_response_exempt is deprecated. It no longer performs a function, and calls to it can be removed.' , DeprecationWarning ) return view_func
modifies a view function so that its response is exempt from the post-processing of the csrf middleware .