将Flask App部署到Azure时WSGI错误

使用Flask部署Azure Web时，始终出现以下错误：

Unhandled exception in wfastcgi.py: Traceback (most recent call last):
  File "D:\home\python364x64\wfastcgi.py", line 791, in main
    env, handler = read_wsgi_handler(response.physical_path)
  File "D:\home\python364x64\wfastcgi.py", line 633, in read_wsgi_handler
    handler = get_wsgi_handler(os.getenv("WSGI_HANDLER"))
  File "D:\home\python364x64\wfastcgi.py", line 603, in get_wsgi_handler
    handler = getattr(handler, name)
AttributeError: module 'app' has no attribute 'app'

这是我的应用程序的结构：

|-app
    |- __init__.py
    |- mod1
    |- mod2
|-config.py
|-runserver.py
|-web.config

这是我的web.config文件：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <appSettings>
    <add key="WSGI_HANDLER" value="app.app"/>
    <add key="PYTHONPATH" value="D:\home\site\wwwroot"/>
    <add key="WSGI_LOG" value="D:\home\LogFiles\wfastcgi.log"/>
  </appSettings>
  <system.webServer>
    <handlers>
      <add name="PythonHandler" path="*" verb="*" modules="FastCgiModule" scriptProcessor="D:\home\python364x64\python.exe|D:\home\python364x64\wfastcgi.py" resourceType="Unspecified" requireAccess="Script"/>
    </handlers>
  </system.webServer>
</configuration>

config.py：

import os

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

class BaseConfig:
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'A SECRET KEY'

class DevelopementConfig(BaseConfig):
    DEBUG = True

runserver.py：

import os
from app import db, create_app

app = create_app(os.getenv('FLASK_ENV') or 'config.DevelopementConfig')


if __name__ == '__main__':   
    app.run()

和应用。初始化.py：

from flask import Flask
def create_app(config):
    app = Flask(__name__)
    app.config.from_object(config)
    return app

我尝试将wsgi.py包含在内：

from app import app as application

与runserver.py处于同一级别，但仍然出现上述错误。我在这里想念什么？