Flask and wsgi, ImportError: cannot import name app

Question

大家好，做了一个flask的小应用，配置在digital ocean上，按照digital ocean的配置说明配置后链接描述，访问站点时报500错误。看了下apache的日志，错误原因如下，还请帮忙看看。

日志报错：

[Thu Jan 01 01:35:21 2015] [error] [client 112.64.71.131] Traceback (most recent call last):
[Thu Jan 01 01:35:21 2015] [error] [client 112.64.71.131]   File "/var/www/qianshan/qianshan.wsgi", line 7, in <module>
[Thu Jan 01 01:35:21 2015] [error] [client 112.64.71.131]     from qianshan import app as application
[Thu Jan 01 01:35:21 2015] [error] [client 112.64.71.131]  ImportError: cannot import name app

项目结构：

.
├── qianshan
│   ├── config.ini
│   ├── __init__.py
│   ├── static
│   ├── templates
│   └── venv
└── qianshan.wsgi

虚拟主机配置

<VirtualHost *:80>
        ServerName qianshan.co
        ServerAdmin [e-mail]
        WSGIScriptAlias / /var/www/qianshan/qianshan.wsgi
        <Directory /var/www/qianshan/qianshan/>
                Order allow,deny
                Allow from all
        </Directory>
        Alias /static /var/www/qianshan/qianshan/static
        <Directory /var/www/qianshan/qianshan/static/>
                Order allow,deny
                Allow from all
        </Directory>
        ErrorLog ${APACHE_LOG_DIR}/error.log
        LogLevel warn
        CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

wsgi

#!/usr/bin/python
import sys
import logging
logging.basicConfig(stream=sys.stderr)
sys.path.insert(0,"/var/www/qianshan/")

from qianshan import app as application
application.secret_key = 'Add your secret key'

init.py file

# Filename: __init__.py
# encoding: utf-8

import ConfigParser
import codecs
from flask import Flask
from flask import render_template

app = Flask(__name__)

@app.route('/')
def index():
    block_list = getBlockList()
    website_dict = getWebsiteDict()
    return render_template('index.html', block_list=block_list, website_dict=website_dict)
...
...
if __name__ == '__main__':
app.run()