ImportError: No module named jinja2

Using google-app-engine tutorial, I got the following error stack message:

Traceback (most recent call last): File "C:\Program Files (x86)\Google\google_appengine\google\appengine\runtime\wsgi.py", line 239, in Handle handler = _config_handle.add_wsgi_middleware(self._LoadHandler()) File "C:\Program Files (x86)\Google\google_appengine\google\appengine\runtime\wsgi.py", line 298, in _LoadHandler handler, path, err = LoadObject(self._handler) File "C:\Program Files (x86)\Google\google_appengine\google\appengine\runtime\wsgi.py", line 84, in LoadObject obj = __import__(path[0]) File "D:\Dev\SandBoxes\web\omaha\omaha.py", line 4, in <module> import jinja2 ImportError: No module named jinja2 

Even though I declared it in the libraries from app.yaml:

application: *** version: 1 runtime: python27 api_version: 1 threadsafe: true libraries: - name: jinja2 version: latest - name: webapp2 version: latest handlers: - url: /css static_dir: css - url: /js static_dir: js - url: /img static_dir: img - url: /.* script: omaha.application 

Has anyone had a similar problem?

8 Answers

In order to use Jinja locally, you need to install it locally

easy_install Jinja2 

or

pip install Jinja2 

Need to restart application in AEL.

The application in Google App Engine Launcher must be restarted for new library calls to be taken into account. I was mislead by the fact all other changes dont need actual restart of the server.

You may not have added the following lines to app.yaml:

- name: jinja2 version: latest 

Use these commands to get pip and Jija2 installed for Python 3:

sudo apt-get install python3-pip sudo pip3 install Jinja2 

brew install jinja2-cli 

for them brew users

Even though it's declared in your libraries it doesn't necessarily mean the dev app server can find the library within the appengine sdk.

Since you're running the tutorial, I'm assuming you are running the application from googles app engine launcher. Within the laucher go into "Edit" >> "Prefences" and set your Python Path and SDK Path.

I had this error when the flask package threw this error:

import flask File "/usr/local/lib/python2.7/dist-packages/flask/__init__.py", line 19, in <module> from jinja2 import Markup, escape ImportError: No module named jinja2 

Solution:

sudo apt-get install python-flask 

It seems to install Jinja as a dependency. Perhaps this helps someone.

Please lower the version for jinja.This worked for me.

pip install Jinja2==3.0.3