PythonFlask应用程序返回非

Question

基本上，在应用程序中，我连接到sql数据库，并尝试检索用户输入的结果，这些输入是AGE、SEX和{}。

我可以为用户输入年龄和SEX，并获得所需的结果，但当我为AGE、SEX和{}提供用户输入时，我的网页返回NONE值。在

Python代码：

import MySQLdb
from flask import Flask, render_template, request
from flask.ext.mysqldb import MySQL

app = Flask(__name__)

db = MySQLdb.connect("127.0.0.1","root","","health" )

@app.route("/", methods = ['GET','POST'])
def home():
    return render_template('home.html')




@app.route("/value", methods = ['GET','POST'])
def Authenticate():
    cursor = db.cursor()
    AGE = request.form['AGE']
    SEX = request.form['SEX']
    ADMITTING_DIAGNOSIS_CODE = request.form['ADMITTING_DIAGNOSIS_CODE']
    #DIAGNOSIS_CODE_1= request.args['DIAGNOSIS_CODE_1']

    sql = 'select avg(LENGTH_OF_STAY),avg(TOTAL_CHARGES),(select count(*) from health where AGE = %s and SEX = %s and ADMITTING_DIAGNOSIS_CODE = %s and DISCHARGE_STATUS = "A")/(count(*))*100 as alive,(select count(*) from health where AGE = %s and SEX = %s and ADMITTING_DIAGNOSIS_CODE = %s and DISCHARGE_STATUS = "B")/(count(*))*100 as dead from health where AGE = %s and SEX = %s and ADMITTING_DIAGNOSIS_CODE = %s'

    entries = []
    cursor.execute(sql,(AGE,SEX,ADMITTING_DIAGNOSIS_CODE,AGE,SEX,ADMITTING_DIAGNOSIS_CODE,AGE,SEX,ADMITTING_DIAGNOSIS_CODE,))

    # Fetch all the rows in a list of lists.
    results = cursor.fetchall()
    for row in results:
        entries.append(dict([('avg(LENGTH_OF_STAY)',row[0]),
                             ('avg(TOTAL_CHARGES)',row[1]),
                             ('dead',row[3]),
                             ('alive',row[2])

                             ]))

    return render_template('show_entries.html', entries=entries)

if __name__ == "__main__":
    app.debug = True
    app.run()

HTML代码：

^{pr2}$

输出：

Length of stay  Total charge    Alive   Dead
None                None         None   None