If you are developing for Google AppEngine on Mac, and you have updated python to 2.6.x or higher, you might face this non-sense error over and over:
ImportError: No module named _multiprocessing
The main reason behind this error is that AppEngine (as of this writing) can't get along with python versions higher than 2.5.x.
Fortunately it is quite easy to fix this issue, especially if you are using GoogleAppEngineLauncher:
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