Getting "django.core.exceptions.improperlyconfigured: Geos Is Required And Has Not Been Detected." Although Geos Is Installed

I'm running Django 1.8 and Python 3.4 on Ubuntu 14.04 LTS. Just recently, my Django app has been reporting that GEOS is not present. GEOS is installed and libgeos_c.so is where it'

Solution 1:

I had the same problem today, though in an unrelated python project. This is is the line I also encountered and which led me here:

ImportError: /usr/lib/python3.4/lib-dynload/_ctypes.cpython-34m-x86_64-linux-gnu.so: undefinedsymbol: _PyTraceback_Add

It looks like Ubunut has pushed a Python 3.4 update which is not compatible with existing virtual environments. I'm able to fix the problem by recreating the virtualenv. Where this was impractical for the moment I simply replaced the virtualenv's python with the system one:

cd my-virtualenv
cp /usr/bin/python3.4 bin/python3.4

I can't say if this is a very sane thing to do, but it does seem to work in my case.

Solution 2:

You should do

cp /usr/bin/python3 /path/to/my-virtualenv/bin/python3

instead, because that's the actual non-symlink file.