Cloud9にPython3.6をインストール

curl https://gist.githubusercontent.com/ryanpcmcquen/7ef4bf8dea788f73d82397c2b9d1d796/raw/udev_dpkg_workaround.sh | bash

sudo apt-get update
sudo apt-get install python3.6

sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.4 1
sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 2
sudo update-alternatives --config python3

wget https://bootstrap.pypa.io/ez_setup.py
sudo -H python3 ez_setup.py

wget https://bootstrap.pypa.io/get-pip.py
sudo -H python3 get-pip.py

sudo -H pip3 install pipenv
sudo -H pip3 install setuptools

pipenv --three

Python Versionは「Python 3」を選択

PYTHONPATHに「:/usr/local/lib/python3.6/dist-packages」を追加

import sys

print("sys.version=", sys.version)

# バージョン確認
python3 -V
pip3 -V