After flask modifies the default port

1. Py2.7,flask framework used by the development environment in pycharm,
2. During development, you create the flask project directly in pycharm
code as follows:
3. The phenomenon is that the port is specified or the ip is set together with the port to access /?
app.run not found on user=xxx error 404 page (

)

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

< hr > < H1 >! / usr/bin/python < / H1 > < H1 >--coding: UTF-8--< / H1 >

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

< H1 > renzheng < / H1 >

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 ""
db.close()
print ""

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

< H1 > global VPNUSER < / H1 >

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

< H1 > Open database connection < / H1 >

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

< H1 > use the cursor () method to get operation cursors < / H1 >

cursor = db.cursor()

< H1 > SQL query statement < / H1 >

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

< H1 > sql insert < / H1 >

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

< H1 > try: < / H1 >

cursor.execute(sql1)

< H1 > results = cursor.fetchone () < / H1 >

results = cursor.fetchall()
if results:
    print "have data"
    cursor.execute(sql5)
    db.commit()
    db.close()
    result_now = cursor.fetchall()
    -sharp print result_now[0][0]
    result = {
        "VPNUSER": VPNUSER,
        "PASSWD": result_now[0][0]
    }
    Timer(280, dingshi,[VPNUSER]).start()
    print ""
    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 ""
    return json.dumps(result)

if name ="_ _ main__":

app.run()

< hr >