Importing memcache from google.appengine.api without using dev_appserver.py

Question

According to the Google AppEngine documentation, one should import memcache like this:

from google.appengine.api import memcache

I'm using a virtualenv and I'm creating some scripts to test a library I created for AppEngine. I am not trying to test a website, I am trying to test a specific library that uses memcache. Evidently, without using dev_appserver.py I get an ImportError: No module named google.appengine.api.

I had a look at the source of dev_appserver.py but first I'd like to know if there is a simpler solution that would not require rewriting PATH as Google does.

Thanks!

Robert Kluin · Accepted Answer · 2012-02-07 15:59:49Z

2

There is no simple solution, at the minimum you'll have to setup your Python paths. That's all the dev_appserver wrapper you linked to does. For testing code / libraries I usually write a simple wrapper that does basically the same thing as dev_appserver is doing.

In some cases you'll actually need to go a step further and initialize the stubs as well. If you follow through the dev_appserver code, you'll be able to see how this is done.

answered Feb 7, 2012 at 15:59

Robert Kluin

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2 Comments

charlax Over a year ago

Thanks! I found this very interesting article: blairconrad.wordpress.com/2010/02/20/…

Robert Kluin Over a year ago

Cool, looks like a good resource! I've got similar setup code I use.

max · Accepted Answer · 2012-02-07 06:09:05Z

2

For testing purposes we always create a local checkout of the AppEngine library like this:

GAE_VERSION=1.6.2

resttest: dependencies lib/google_appengine/google/__init__.py
    sh -c "PYTHONPATH=lib/google_appengine/ python tests/resttest.py --hostname=$(TESTHOST) --credentials-user=$(CREDENTIALS_USER)"

lib/google_appengine/google/__init__.py:
    curl -s -O http://googleappengine.googlecode.com/files/google_appengine_$(GAE_VERSION).zip
    unzip -q google_appengine_$(GAE_VERSION).zip
    rm -Rf lib/google_appengine
    mv google_appengine lib/
    rm google_appengine_$(GAE_VERSION).zip

dependencies:
    git submodule update --init

answered Feb 7, 2012 at 6:09

max

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