when i run server i got "name 'http' is not defined" after import h 4000 ttp.server then i got this "no mo

http.server only exists in Python 3. In Python 2, you should use the
BaseHTTPServer module:
from BaseHTTPServer import BaseHTTPRequestHandler
should work just fine.
so if you run in py3 is ok

在Python 3.x中，BaseHTTPServer, SimpleHTTPServer, CGIHTTPServer整合到http.server包，SocketServer改名为socketserver，请注意查阅官方文档。