
def code_400():
    txt="400 Bad Request"
    html='''<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
            <html><head>
            <title>400 Bad Request</title>
            </head><body>
            <h1>Bad Request</h1>
            <p>Your browser sent a request that this server could not understand.<br />
            </p>
            </body></html>'''
    return txt,html



