Pyenv

=== virtualenv ===
https://stackoverflow.com/questions/29149853/no-module-named-virtualenvwrapper
https://virtualenvwrapper.readthedocs.io/en/latest/install.html
https://naysan.ca/2019/08/05/install-python-3-virtualenv-on-ubuntu/
= Install =
https://github.com/pyenv/pyenv-virtualenv
https://github.com/pyenv/pyenv
https://github.com/pyenv/pyenv-virtualenv/issues/36
=== note order ===
note the order for .bashrc file. 
* export PATH="/home/laptop/.pyenv/bin:$PATH" 
* eval "$(pyenv virtualenv-init -)"
* eval "$(pyenv init -)"
pyenv virtualenv 3.6.9 mytest
=== 16.04 ===
https://gist.github.com/Geoyi/d9fab4f609e9f75941946be45000632b
=== ubuntu 16.04 ===
pyenv can't install without libssl1.0-dev , get from debian repo. 
https://github.com/servo/servo/issues/15759 
https://packages.debian.org/jessie/libssl-dev
https://packages.debian.org/jessie/libssl1.0.0
wget http://security.debian.org/debian-security/pool/updates/main/o/openssl/libssl1.0.0_1.0.1t-1+deb8u12_amd64.deb
The pydev developers insists on using and old ssh repo so they can
mine Monero on your gpu with python3 , it runs at 54watts to try and hide this. 
run nvidia-smi to see python3 mining, below the xorg entry.
Your GPU firefox usage should never go above 20watts. 
== 2 ==
* https://github.com/pyenv/pyenv ,
 https://github.com/pyenv/pyenv-installer
https://gist.github.com/softwaredoug/a871647f53a0810c55ac 27 stars links to http://opencafe.readthedocs.io/en/latest/getting_started/pyenv/
https://gist.github.com/jaydenkieran/75b2bbc32b5b70c4fdfb161ecdb6daa2 Debian Jessie does not come with the correct Python version out of the box, and instead comes with Python 2. To be able to install Python 3(.5), we have a few options. We could build and install from source, but as per Debian's website, we shouldn't do this. Instead, we will use pyenv, a tool that allows users to switch Python versions easily without breaking their system. seven stars. 
https://amaral.northwestern.edu/resources/guides/pyenv-tutorial
https://pypi.python.org/pypi/pyenv/ install from github and not pip
https://anil.io/blog/python/pyenv/using-pyenv-to-install-multiple-python-versions-tox/
https://tutorials.technology/tutorials/14-how-to-switch-between-multiple-python-interpreters.html
=== links ===
Python
Python integration
Category:Python