Pressing the Red Button

Importing a List with BulkLoader

The latest bulkloader script (api version 1.3.4) does a much better job of exporting data when you auto generate a .yaml file. However it doesn’t handle the re-import of lists by default (it just treats them as strings). You can add an inline lambda function to the .yaml file to fix this. This handles lists [...]

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How to Delete an Index in an AppEngine Datastore

If using Python, you can delete an index by first removing the entry in your index.yaml file, and then updating your site. Then you must issue this command: appcfg.py vacuum_indexes myapp/ With Django (what I am using), you use this command: manage.py vacuum_indexes What is nice about the process is that, for each index that [...]

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Google AppEngine: appcfg.py update check failed

I started getting this error in Windows when running ‘manage runserver’ in django on Google AppEngine: appcfg.py update check failed: EOF occurred in violation of protocol This error is related to not having the SSL module for python installed. The easy fix is to install it by running “easy_install ssl” from the command prompt. However, [...]

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Solving “InvalidSenderError: Unauthorized sender” in AppEngine

You might get this message in Google AppEngine when sending an email message and specifying a custom from address. To get it to work you must add the address as a developer for your application (or use the email address you signed up with). Steps to Add a Developer Email Address: Log in to your [...]

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UrlEncode in Python

To urlencode a querystring or form data in python you can use the urllib module: use urllib # you have to pass in a dictionary print urllib.urlencode({'id':'100', 'name':'john smith'}) # then you get 'id=100&name=john+smith' Urlencoding Unicode and UTF8 Values #this works fine print urllib.urlencode({name:'José'}) #you have to be careful with unicode strings # this will [...]

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