代码

from wsgiref.simple_server import make_server
def simple_app(environ, start_response):
    status = '200 OK'
    headers = [('Content-type', 'text/plain; charset=utf-8')]
    start_response(status, headers)

    html = '<h1>Hello World</h1>'.encode("utf-8")
    return [html]
server = make_server("0.0.0.0", 9000, simple_app)
print("Begin Listening Port 9000......")
server.serve_forever()

执行后，浏览器访问

h1没生效，不知道为什么