Already solved, you need to add `export PYENV_ROOT=/usr/local/var/pyenv under the .bash_profile file after installing pyenv if which pyenv > /dev/null; then eval "$(pyenv init -) "; fi` After these two lines, source it. Then install 2.7.10 and 3.5.1, and then you can switch normally
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Already solved, you need to add
`export PYENV_ROOT=/usr/local/var/pyenv under the .bash_profile file after installing pyenv
if which pyenv > /dev/null; then eval "$(pyenv init -) "; fi`
After these two lines, source it. Then install 2.7.10 and 3.5.1, and then you can switch normally
tryglobal
pyenv global 3.5.1