问题

利用js动态处理json数据，图表实时显示增量数据，代码之前测试可以正常显示，现在又不可以了，求指点

代码

是不是5s刷新一次写错了？

#!/usr/bin/env python
# coding=utf-8 

from flask import Flask,render_template,request
from mod import app,db,Cpu
import json

cx_time = 0

@app.route('/')
def index():
    cpu = Cpu.query.all()
    return render_template('index.html',cpu=cpu)

@app.route('/api/')
def api(name):
    if name=='data':
        q=request.args['q']
        global cx_time
        if cx_time > 0:
            qname = Cpu.query.filter(Cpu.time > cx_time / 1000).all()
        else:
            qname = Cpu.query.all()
        arr = []
        for i in qname:
            if q=='user':
                arr.append([i.time*1000,i.user])
            elif q=='system':
                arr.append([i.time*1000,i.system])
            elif q=='idle':
                arr.append([i.time*1000,i.idle])
        if len(arr)>0:
            cx_time=arr[-1][0]
            #cx_time=0
        #cx_time=0
        return json.dumps(arr)


@app.route('/data')
def data():
    global cx_time
    if cx_time > 0:
        cpu = Cpu.query.filter(Cpu.time > cx_time/1000 ).all()
    else:
        cpu = Cpu.query.all()
    arr = []
    for i in cpu:
        arr.append([i.time*1000,i.user])
    if len(arr)>0:
        cx_time =arr[-1][0]
    return json.dumps(arr)

if __name__ == '__main__':
    app.run(host='0.0.0.0',port=5000,debug=True)

#!/usr/bin/env python
# coding=utf-8

from flask import Flask,render_template
from flask_sqlalchemy import SQLAlchemy

import os

basedir = os.path.abspath(os.path.dirname(__file__))

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + os.path.join(basedir, 'data.sqlite')
app.config['SQLALCHEMY_COMMIT_ON_TEARDOWN'] = True
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True

db = SQLAlchemy(app)

class Cpu(db.Model):
    user = db.Column(db.Float,primary_key=True)
    system = db.Column(db.Float)
    idle = db.Column(db.Float)
    time = db.Column(db.Integer)

    def __init__(self,user,system,idle,time):
        self.user = user
        self.system = system
        self.idle = idle
        self.time = time

    def __repr__(self):
        return '{0} {1}'.format(self.user,self.time)

#!/usr/bin/env python
# coding=utf-8 

import time
import psutil
from mod import db,Cpu

db.create_all()

def getCpu():
    info = psutil.cpu_times()
    data = []
    data.append(info.user)
    data.append(info.system)
    data.append(info.idle)
    cpu=Cpu(user=data[0],system=data[1],idle=data[2],time=int(time.time()))
    db.session.add(cpu)
    db.session.commit()

while True:
    time.sleep(5)
    getCpu()

代码如上，之前测试还可以的