"""HTTP server base class.Note: the class in this module doesn't implement any HTTP request; seeSimpleHTTPServer for simple implementations of GET, HEAD and POST(including CGI scripts). It does,

#SocketServer.py代码解析__version__ = "0.4"import socketimport selectimport sysimport osimport errnotry: import threadingexcept ImportError: import dummy_threading as threading__all__

python的contextlib模块解析