Cannot switch Python with pyenv

I would like to use pyenv to switch python2 and python3.

I successfully downloaded python2 and python3 and pyenv with following codes.

brew install pyenv

brew install pyenv-virtualenv

pyenv install 2.7.10

pyenv install 3.5.0

However, I cannot switch from python2 to python3..

Soma-Suzuki:~ Soma$ python --version
Python 2.7.10
Soma-Suzuki:~ Soma$ pyenv global
2.7.10
Soma-Suzuki:~ Soma$ pyenv versions
  system
* 2.7.10 (set by /Users/Soma/.pyenv/version)
  3.5.0
Soma-Suzuki:~ Soma$ pyenv global 3.5.0
Soma-Suzuki:~ Soma$ pyenv global
3.5.0
Soma-Suzuki:~ Soma$ pyenv versions
  system
  2.7.10
* 3.5.0 (set by /Users/Soma/.pyenv/version)
Soma-Suzuki:~ Soma$ python --version
Python 2.7.10
Soma-Suzuki:~ Soma$

I do not understand why this happens.

For your information. My python is in this directory.

Soma-Suzuki:~ Soma$ which python
/usr/bin/python

Thank you in advance.

[July 2021]
If you see this message when running eval "$(pyenv init -)"

WARNING: `pyenv init -` no longer sets PATH.
Run `pyenv init` to see the necessary changes to make to your configuration.

you should check the message from pyenv init as the warning says, but in a nutshell, you can use eval "$(pyenv init --path)" instead.

And don't forget to accordingly update your ~/.bash_profile, ~/.zprofile, ~/.bashrc, ~/.zshrc or the like if necessary.

Try this: eval "$(pyenv init -)"

Example:

$ python -V
Python 2.7.9
mac:~ $ eval "$(pyenv init -)"
mac:~ $ python -V
Python 3.5.0

More info: https://github.com/pyenv/pyenv

For me, this worked on MacOS with ZSH after installing via Homebrew:

echo 'eval "$(pyenv init --path)"' >> ~/.zprofile

I initially had eval "$(pyenv init -)" inside of my ~/.zshrc file, but that didn't seem to work. After following this guide: https://github.com/pyenv/pyenv#basic-github-checkout I remved the eval call from the .zshrc file and added it to the .zprofile file using the above command and after restarting terminal everything worked.

In ubuntu the ~/.bashrc file needs to be updated and change eval "$(pyenv init -)" to eval "$(pyenv init --path)"

You forgot to add this eval "$(pyenv init -)".

Add this to your .bash_profile or .bashrc file (mac <=10.14) or to your .zshrc file (mac 10.15+)

Cannot switch Python with pyenv

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