我正在嘗試運行我的代碼，但是當我點擊鏈接時，我得到了404: Not Found. 這是我的代碼：from flask import Flask,jsonify,render_template,requestapp = Flask(__name__)if __name__ == '__main__':    app.run()tempusage = 0weightsusage = 0curencyusage = 0cost = 0userip = '1.1.1.1'@app.route('/tempreature/c2f/<int:temp>', methods=['GET'])def c2f(temp):    tempreature = temp    ftemp = (tempreature * (9/5)) + 32    tempreatures = [    {        'conversionType': u'Tempreature',        'from': u'Celcius',        'fromValue':tempreature,        'to' : u'Faherenheit',        'tovalue':ftemp    }]    global userip    userip = request.environ['REMOTE_ADDR']    global tempusage    if userip == request.environ['REMOTE_ADDR']:       tempusage  += 1    return jsonify({'tempreatures':  tempreatures})@app.route('/tempreature/f2c/<int:temp>', methods=['GET'])def f2c(temp):    tempreature = (temp -32)*(5/9)    ftemp = tempreature/10    tempreatures = [    {        'conversionType': u'Tempreature',        'from': u'Faherenheit',        'fromValue':tempreature,        'to' : u'Celcius',        'tovalue':ftemp    }]    global tempusage    global userip    userip = request.environ['REMOTE_ADDR']    if userip == request.environ['REMOTE_ADDR']:       tempusage += 1    return jsonify({'tempreatures':  tempreatures})@app.route('/weight/k2p/<int:w>', methods=['GET'])def k2p(w):    weight = w*2.205    fweight= w/10    weights = [    {        'conversionType': u'Weight',        'from': u'kg',        'fromValue':weight,        'to' : u'pounds',        'tovalue':fweight    }]    global userip    userip = request.environ['REMOTE_ADDR']    global weightsusage    if userip == request.environ['REMOTE_ADDR']:      weightsusage += 1    return jsonify({'weights': weights})我在終端得到這個：* 服務 Flask 應用程序“app”（延遲加載） * 環境：生產   警告：不要在生產環境中使用開發服務器。   改用生產 WSGI 服務器。 * 調試模式：關閉 * 在 http://127.0.0.1:5000/ 上運行（按 CTRL+C 退出）127.0.0.1 - - [11/Dec/2018 16:15:42] "GET / HTTP/1.1" 404 -