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    Head First Python
    Dedication
    A Note Regarding Supplemental Files
    Advance Praise for Head First Python
    Praise for other Head First books
    Author of Head First Python
    How to use This Book: Intro
    1. Meet Python: Everyone loves lists
    2. Sharing your Code: Modules of functions
    3. Files and Exceptions: Dealing with errors
    4. Persistence: Saving data to files
    5. Comprehending data: Work that data!
    6. Custom data Objects: Bundling code with data
    7. Web Development: Putting it all together
    8. Mobile app Development: Small devices
    9. Manage Your data: Handling input
    10. Scaling your Webapp: Getting real
    There are whale sightings everywhere
    The HFWWG needs to automate
    Build your webapp with Google App Engine
    Download and install App Engine
    Make sure App Engine is working
    App Engine uses the MVC pattern
    Model your data with App Engine
    What good is a model without a view?
    Use templates in App Engine
    Django’s form validation framework
    Check your form
    Controlling your App Engine webapp
    Restrict input by providing options
    Meet the “blank screen of death”
    Process the POST within your webapp
    Put your data in the datastore
    Don’t break the “robustness principle”
    Accept almost any date and time
    It looks like you’re not quite done yet
    Sometimes, the tiniest change can make all the difference...
    Capture your user’s Google ID, too
    Deploy your webapp to Google’s cloud
    Your HFWWG webapp is deployed!
    Your Python Toolbox
    11. Dealing with Complexity: Data wrangling
    A. Leftovers: The Top Ten Things (we didn’t cover)
    Index
    About the Author
    Copyright
    • Create BookmarkCreate Bookmark
    • Create Note or TagCreate Note or Tag
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    10. Scaling your Webapp: Getting real > Controlling your App Engine webapp

    Controlling your App Engine webapp

    Like your other webapps, it makes sense to arrange your webapp controller code within a specific folder structure. Here’s one suggestion:

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    image with no caption

    As you’ve seen, any CGI can run on GAE, but to get the most out of Google’s technology, you need to code to the WSGI standard. Here’s some boilerplate code that every WSGI-compatible GAE webapp starts with:

    image with no caption

    App Engine Code Magnets

    Let’s put everything together. Your model code is already in your hfwwgDB.py file. All you need to do is move that file into your webapp’s top-level folder. Copy your templates folder in there, too. Your webapp’s controller code, in a file called hfwwg.py, also needs to exist in your top-level folder. The only problem is that some of the code’s all over the floor. Rearrange the magnets to fix things.


      

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