flask修改默认端口后404

Question

1.开发环境在pycharm，用的py2.7，flask框架
2.开发时就是直接在pycharm中创建flask工程
代码如下：
3.现象就是指定了端口或者监听ip和端口一起设置后访问/？user=xxx报错 404页面未找到
app.run(

    host = '0.0.0.0',
    port = 7777,  
    debug = True 
)

---

!/usr/bin/python

-- coding: UTF-8 --

import pyotp
import MySQLdb
import time
from flask import Flask
from flask.ext.httpauth import HTTPBasicAuth
from flask import request
import json
from threading import Timer

renzheng

auth = HTTPBasicAuth()
app = Flask(__name__)

def dingshi(USER):

db = MySQLdb.connect("localhost", "root", "xxxxx", "flask")
cursor = db.cursor()
BASE = pyotp.random_base32()
totp = pyotp.TOTP("%s" % BASE)
PASSWD = totp.now()
sql4 = "delete from users where name='%s'" % USER
cursor.execute(sql4)
db.commit()
print '修改完毕'
db.close()
print '关闭数据库链接'

@app.route('/')
def getvpnpasswd():

global VPNUSER

VPNUSER = request.args.get('user')
BASE = pyotp.random_base32()
totp = pyotp.TOTP("%s" % BASE)
PASSWD = totp.now()

打开数据库连接

db = MySQLdb.connect("localhost","root","asin7SGAcdB12ci^t5987.com","flask" )

使用cursor()方法获取操作游标

cursor = db.cursor()

SQL 查询语句

sql1 = "SELECT name FROM users where name='%s'" %VPNUSER
sql5 = "select passwd from users where name='%s'" %VPNUSER

sql insert

sql2 = ('insert into users(name) values("%s")' %VPNUSER)
sql3 = "update users set passwd='%s' where name='%s'" %(PASSWD,VPNUSER)

try:

cursor.execute(sql1)

results = cursor.fetchone()

results = cursor.fetchall()
if results:
    print "have data"
    cursor.execute(sql5)
    db.commit()
    db.close()
    result_now = cursor.fetchall()
    # print result_now[0][0]
    result = {
        'VPNUSER': VPNUSER,
        'PASSWD': result_now[0][0]
    }
    Timer(280, dingshi,[VPNUSER]).start()
    print '定时任务开始执行'
    return json.dumps(result)
else:
    print "no data"
    cursor.execute(sql2)
    cursor.execute(sql3)
    db.commit()
    print "yijing charu"
    db.close()
    result = {
       'VPNUSER': VPNUSER,
       'PASSWD': PASSWD
     }
    Timer(280, dingshi,[VPNUSER]).start()
    print '定时任务开始执行'
    return json.dumps(result)

if name == '__main__':

app.run()

---