human
Solve the following python programming problem given the following code:
def reset_environment_middleware(app, frozen_environment, frozen_user_env, frozen_env_config_env) : 
    'Replace the contents of os.environ with a frozen env + request data.

    This requires a single-threaded webserver, or for os.environ to be patched
    to be thread-local.

    Args:
        app: The WSGI app to wrap.
        frozen_environment: An iterable of (key, value) tuples that can be used
            to populate os.environ with the initial state of the environment.
            `tuple(os.environ.iteritems())` produces appropriate output.
        frozen_user_env: An iterable of (key, value) tuples that can be used to
            populate os.environ with environment variables specified in
            app.yaml.
        frozen_env_config_env: An iterable of (key, value) tuples that can be
            used to populate os.environ with configuration-dependent env
            variables.

    Returns:
        The wrapped app, also a WSGI app.
    ' 
    @ wrappers.Request.application 
    def reset_environment_wrapper(request) : 
        'Reset the system environment and populate it with wsgi_env.' 
        os.environ.clear () 
        os.environ.update (frozen_user_env) 
        os.environ.update (frozen_environment) 
        mutate_env_to_overwrite_remote_addr (request.environ) 
        os.environ.update (request_environment_for_wsgi_env (request.environ)) 
        os.environ.update (frozen_env_config_env) 
        os.environ.update (reserved_env_keys_for_wsgi_env (request.environ)) 
        os.environ.update (get_env_to_hide_service_bridge (request.environ)) 
        return app 
return frozen_environment 

    
    

    Fix the buggy line: return frozen_environment
assistant
#Here is Python program to fix the buggy line: return frozen_environment
.

return def reset_environment_wrapper(