如何使用python27 app engine webapp2框架来组织文件 [英] how to organise files with python27 app engine webapp2 framework

问题描述

我已经通过了python27和应用程序引擎的入门啧啧了：的https： //developers.google.com/appengine/docs/python/gettingstartedpython27/

I've gone through the getting started tut for python27 and app engine: https://developers.google.com/appengine/docs/python/gettingstartedpython27/

到tut结束时，所有的类都在相同的文件（helloworld.py），然后你和你配置路由器将URL路径指向文件底部的一个类：

By the end of the tut, all the the classes are in the same file (helloworld.py) and you and you configure the router to point a url path to a class at the bottom of the file:

 app = webapp2.WSGIApplication([('/', MainPage),
                           ('/sign', Guestbook)],
                          debug=True)

tut并未涵盖的是随着我的应用程序的增长，我该如何规划我的类/文件。例如，我会将MainPage放在一个单独的文件中，然后在helloworld.py文件中调用'import MainPage'并将路由添加到WSGIApplication？有没有比这更自动化的东西？我应该怎样调用MainPage文件并将它存储在哪里？

What the tut did not cover is how do I orginise my classes / files as my app grows. For example, would I put MainPage in a separate file and then call 'import MainPage' in the helloworld.py file and add the route to the WSGIApplication? Is there anything more automated than this? What should I call the MainPage file and where should I store it?

推荐答案

最好在应用程序启动时导入所有处理程序将利用 webapp2的懒处理程序加载，该程序将加载模块/根据需要安装包。

所以你有几个选择：

Preferable to importing all of your handlers at app-startup is to take advantage of webapp2's lazy handler loading which loads modules/packages as needed.
So you have a couple of options:

选项1，模块中的处理程序 >
在 helloworld.py 文件的同一级别的另一个文件（模块）中放置 MainPage ：

Option 1, Handlers in a module
Place MainPage in another file (module) at the same level as your helloworld.py file:

/my_gae_app
    app.yaml
    helloworld.py
    handlers.py

在你的路由中（在 helloworld.py 中），你应该这样做：

And in your routing (in helloworld.py) you would do:

app = webapp2.WSGIApplication([('/', 'handlers.MainPage'),
                               ('/sign', 'handlers.Guestbook')],
                              debug=True)

---

选项2，包装中的处理程序;或许考虑你的应用程序变得更大

随着你的应用程序变大，你可能希望创建一个放置你的处理程序的包：

---

Option 2, Handlers in a package; perhaps consider as your app gets larger
As your app gets larger you may wish to create a package in which to place your handlers:

/my_gae_app
    /handlers
        __init__.py
        guestbook.py
        main.py
    app.yaml
    helloworld.py

路径（ helloworld.py ）：

app = webapp2.WSGIApplication([('/', 'handlers.main.MainPage'),
                               ('/sign', 'handlers.guestbook.Guestbook')],
                              debug=True)

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