闪现是基于session的 ,session是基于会话的，所以不同用户的请求不会搞混。

from flask import  Flask,request,redirect,flash,get_flashed_messages


app = Flask(__name__)
app.secret_key="ddtegesgee"

@app.route('/index')
def index():
    name = request.args.get("name")
    if name == "kk":
        return "index!"
    else:
        flash("%s error!"%(name))
        # return "error"
        return  redirect("/error")

@app.route("/error")
def error():
    msg = get_flashed_messages()
    return "error,%s!"%(msg)


if __name__ == '__main__':
    app.run()

标签：__,return,name,Flask,app,闪现,error
来源： https://blog.csdn.net/kanghui_898/article/details/100734160