AWS Cloud9 に Python3 を導入AWS Cloud9 の environment を作り Preferences(歯車マーク)→ PROJECT SETTINGS → Python Support の Python Version: Python 3 に変更 .bashrcのaliasをpython36に変更 $ alias python=python36 以下のコマンドを投入 $ sudo update-alternatives --config python2を選択 There are 2 programs which provide 'python'. Selection Command ----------------------------------------------- *+ 1 /usr/bin/python2.7 2 /usr/bin/python3.