import time from werkzeug.wrappers import Request,Resp @Request.application def app(request): host=request.host if':' in host: host,port=host.split(':',1) if request.method !='GET': return Response('501 NotImplemented',status=501) elif host !='127.0.0.1'or request.path !='/': return Response('404 Not Found',status=404) else: return Response(timectime()) if __name__ == '__main__': httpd = make_server('',80,app) host, port = httpd.socket.getsockname() print('Serving on', host, 'port', port) httpd.serve_forever()修改此代码，使之能够顺利运行

在这段代码中，缺少了 `from wsgiref.simple_server import make_server` 的引用，需要添加进来。修改后的代码如下：

import time
from werkzeug.wrappers import Request, Response
from wsgiref.simple_server import make_server

@Request.application
def app(request):
    host = request.host
    if ':' in host:
        host, port = host.split(':', 1)
    if request.method != 'GET':
        return Response('501 NotImplemented', status=501)
    elif host != '127.0.0.1' or request.path != '/':
        return Response('404 Not Found', status=404)
    else:
        return Response(time.ctime())

if __name__ == '__main__':
    httpd = make_server('', 80, app)
    host, port = httpd.socket.getsockname()
    print('Serving on', host, 'port', port)
    httpd.serve_forever()

修改后，代码中的 `make_server` 函数将创建一个简单的 WSGI 服务器，并将其绑定到本地主机的80端口上。然后，调用 `serve_forever` 函数来启动服务器并等待来自客户端的请求。最后，当有请求到来时，服务器会将其转发给应用程序中定义的 `app` 函数进行处理，并返回响应。