Python « Stivlo

06 – Google App Engine for Python – Jinja2 Templates Intro

By stefano, on May 18th, 2012%

In this video tutorial I show how to use Jinja2 Templates on Google App Engine for Python. . . . → Read More: 06 – Google App Engine for Python – Jinja2 Templates Intro

05 – Google App Engine for Python – Preserving User Input

By stefano, on May 18th, 2012%

Preserving user input, storing them in the session. How to escape values to be inserted in HTML. . . . → Read More: 05 – Google App Engine for Python – Preserving User Input

04 – Google App Engine for Python – Validation & Sessions

By stefano, on May 11th, 2012%

A simple validation and how to keep values in the session. . . . → Read More: 04 – Google App Engine for Python – Validation & Sessions

03 – Google App Engine for Python – HTML & Form Parameters

By stefano, on May 8th, 2012%

In this video I output HTML as a string and I read form parameters. . . . → Read More: 03 – Google App Engine for Python – HTML & Form Parameters

02 – Google App Engine for Python – Deploying

By stefano, on May 8th, 2012%

Second part of the tutorial showing how to deploy your application to Google App Engine.

01 – Google App Engine for Python – Hello World

By stefano, on May 7th, 2012%

My first public screencast: a tutorial showing how to create a Hello World application using Google App Engine for Python!

Dumping and Restoring Data with Google App Engine

By stefano, on November 27th, 2011%

Google App Engine has a way to dump and restore data, using the bulkloader.py command from Python SDK.

To be able to use it with a Java application, first we’ve to map the RemoteApiServlet in web.xml

<servlet> <servlet-name>RemoteApi</servlet-name> <servlet-class>com.google.apphosting.utils.remoteapi.RemoteApiServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>RemoteApi</servlet-name> <url-pattern>/remote_api</url-pattern> </servlet-mapping>

Here is the command to dump all the instances of . . . → Read More: Dumping and Restoring Data with Google App Engine

Cleaning up unused indexes in Google App Engine

By stefano, on November 27th, 2011%

Google App Engine allows 200 datastore indexes, so once in a while is a good idea to clean up unused indexes. This operation is called vacuum-indexes, and is available in the Python and Java SDK.

I’ve done the index cleaning in my Java application using the Python SDK, because historically this operation was possible only . . . → Read More: Cleaning up unused indexes in Google App Engine

Trac woes

By stefano, on May 2nd, 2011%

After upgrading my Ubuntu Maverick Meerkat to Natty Narwhal, My Trac installation greeted me with “500 Internal Server Error”.

Checking apache error log I saw “ImportError: No module named trac.web.modpython_frontend“.

[Mon May 02 14:02:24 2011] [error] [client 192.168.254.100] mod_python (pid=1991, interpreter=’main_interpreter’, phase=’PythonHandler’, handler=’trac.web.modpython_frontend’): Application error [Mon May 02 14:02:24 2011] [error] [client 192.168.254.100] ServerName: ‘::1′ . . . → Read More: Trac woes

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