Webapp2 jinja2 error template handler

def HTTPErrorHandler(request, response, exception):
    if isinstance(exception, webapp2.HTTPException):
        code = exception.code
    else: code = 500

    while(True):
        try:
            template = jinja_env.get_template(str(code) + ".html")
            response.write(template.render())
            response.set_status(code)
            break
        except:
            if code == 500:
                response.write("<h1>Error 500</h1>The server is absolutely broken right now")
                response.set_status(500)
                break
            else:
                code = 500