Make sure you are doing the 'pip install -r requirements.txt' as shown in 
the documentation 
a fresh virtualenv. Also make sure that you didn't already install this 
library outside of the virtualenv as this may cause conflicting versions of 
the package when the virtualenv is created which would result in this error 
(aka never install packages globally). 

- Note that Google Groups is for general product discussions and not for 
technical support. It is recommended to continue all further investigations 
in your Stack Overflow post 
You might also want to report this to the Google engineers working on this 
tutorial in their Issue Tracker 
the above does not resolve the issue. 

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  • [google-appengine]... Mark Anthony Gutierrez
    • [google-appen... 'Jordan (Cloud Platform Support)' via Google App Engine

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