Tag Archive | "python"

Importing a List with BulkLoader

Friday, June 18, 2010


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

Sunday, April 18, 2010

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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

Tuesday, April 13, 2010

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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

Monday, March 8, 2010


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

Tuesday, November 3, 2009


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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