$ which python
/Users/ryosuke-hujisawa/.pyenv/shims/python
$ which python3
/Users/ryosuke-hujisawa/.pyenv/shims/python3ちなみに
$ which python
/usr/bin/python
$ sudo rm -rf /usr/bin/python
rm: /usr/bin/python: Operation not permittedデフォルトのPythonは消せない
