from wsgiref.simple_server import make_server

def application(environ, start_response):

    start_response('200 OK', [('Content-type', 'text/html')])

    print(environ)

    path=environ['PATH_INFO']   #注意PATH_INFO中间的下划线

    if path=="/book":

        return [b'xxxx']

    elif path=="/phone":

        return [b'xxxxx']

    else:

        return [b'<h1>404</h1>']

httpd = make_server('127.0.0.1', 8080, application)     #地址要用引号引起来，端口不用

httpd.serve_forever()