Local development of Google App Engine not importing built-in library

Question

I followed the quickstart then I simply clone hello_world from here. I already downloaded google_appengine sdk from here. I extract it and now I have folder google_appengine alongside with hello_world

so I execute it like this:

It runs well apparently, until I start to request to localhost:8080. then I got this error:

what's wrong with it? did I miss something? google said that I can use the built-in library without manually install it with pip.

PS: it works when I just deploy it to my project on Google. and also it works if I manually install webapp2 inside lib inside hello_world like described here then request it locally.

my python version Python 2.7.6 on ubuntu 14.04 32bit

Please if anybody can solve this I would be appreciate it.

Answer 1

Thanks to @Dmytro Sadovnychyi for the answer. It doesn't work for me to uninstall those packages because I never installed it before, But that makes me think maybe built-in library conflict with other package so I decide to create Virtual Environment. just fresh environment no need to install any package.

activate the environment then execute dev_appserver.py hello_world now it works

for now I'll stick with it until next update like said here

Answer 2

Seems like this is acknowledged bug in app engine SDK. As a temporary workaround, you may try this steps:

Uninstalling the following PIP packages resolved this issue for me.

sudo pip uninstall gcloud

sudo pip uninstall googleapis-common-protos

sudo pip uninstall protobuf

Credit to this thread: https://groups.google.com/forum/?hl=nl#!topic/google-appengine/LucknWk8iaQ

Be sure to use correct executable of pip if you use virtualenv or have multiple python versions installed.