Ok the trick was to install nest in a directory like: '/home/username/opt/nest' cause otherwise nest won't find python by itself. For example this didn't work: '/~/opt/nest' Also, be sure to install all the required libraries before the installation (libgsl,libncurse etc.). If you do these two things, you will probably never meet any of my problems.
- For Geany I could not find a way to change PYTHONPATH but for Spyder, there is an option in 'Tools' that's pretty easy to use (you just find your pythonpath directory manually)
- For iPython, I followed these instructions and entered my path instead of '~/code/eol_hsrl_python' and '~/hsrl_config'