Installation instruction for ptpython
virtualenv venv
source venv/bin/activate
pip install -r requirements.txt
deactivate
venv/bin/ptpython
source venv/bin/activate
pip install -U -r requirements.txt
deactivate
git submodule init
git submodule update
cd pylibs
git submodule init
git submodule update
cd ../venv/lib/python3.*/site-packages
for lib in ls -d ../../../../pylibs/*/
; do ln -s $lib; done