virtualenvを使う必要もなく $ conda create -n py27 python=2.7 anaconda とすれば,{Anaconda3のパス}/env/py27 が作成される. python2.7を使いたくなったら下記コマンド. windowsでは $ activate py27 python3に戻すときは下記コマンド. $ deactivate 以上,非常に簡単. Anaconda素晴らしい. 【追記】 macでは python2.7を使うときは, (anaconda3-2.5.0の場合) $ source ~/.pyenv/versions/anaconda3-2.5.0/bin/activate py27 python3に戻すときは $ source ~/.pyenv/versions/anaconda3-2.5.0/bin/deactivate 上記は長いので,
![Anaconda3を入れた後,python2.7を使いたくなった時の環境構築法 - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/968760bf91ce5fdb5e83112fea9eb4004ec05389/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9QW5hY29uZGEzJUUzJTgyJTkyJUU1JTg1JUE1JUUzJTgyJThDJUUzJTgxJTlGJUU1JUJFJThDJUVGJUJDJThDcHl0aG9uMi43JUUzJTgyJTkyJUU0JUJEJUJGJUUzJTgxJTg0JUUzJTgxJTlGJUUzJTgxJThGJUUzJTgxJUFBJUUzJTgxJUEzJUUzJTgxJTlGJUU2JTk5JTgyJUUzJTgxJUFFJUU3JTkyJUIwJUU1JUEyJTgzJUU2JUE3JThCJUU3JUFGJTg5JUU2JUIzJTk1JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmcz1jNDgxNWI4M2RiNDAzNzYyMTdkMzdkNGMxNWM1MzgyMA%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBMaXR0bGVXYXQmdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT0zNiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZzPWQzYWFlY2JjYjgyYmFiMjU0NTQyNjNjNTU5ZjI5YWNm%26blend-x%3D142%26blend-y%3D436%26blend-mode%3Dnormal%26txt64%3DaW4gS0RESeagquW8j-S8muekvg%26txt-width%3D770%26txt-clip%3Dend%252Cellipsis%26txt-color%3D%2523212121%26txt-font%3DHiragino%2520Sans%2520W6%26txt-size%3D36%26txt-x%3D156%26txt-y%3D536%26s%3D7eaccb33374e122ebd9c41250cd2b5ef)