#Very differences between virtual envs. https://stackoverflow.com/questions/41573587/what-is-the-difference-between-venv-pyvenv-pyenv-virtualenv-virtualenvwrappe
#Decided to use pipenv https://pypi.org/project/pipenv/ Mostly because it's new, combines both pip and virtualenv.
#Install from system python virtualenv --python=/usr/bin/python2.6 <path/to/new/virtualenv/>
#Pyenv https://github.com/pyenv/pyenv/blob/master/COMMANDS.md
jupyter --> depends on $PATH.
Now working on pip under anaconda. anaconda2/bin/pip
#Error clang in pyenv 2.7.6 when installing sth OK for python >=2.7.8
#ssl issue
CFLAGS="-I$(brew --prefix openssl)/include"
LDFLAGS="-L$(brew --prefix openssl)/lib"
pyenv install -v 3.4.3