Mac OS uses pyenv to manage Python multiple versions

1 Installing Pyenv

Brew Install Pyenv

2 Configuring ~/bash_profile

Export pyenv_root= "$HOME/.pyenv" Export path= "$PYENV _root/bin: $PATH" eval "$ (pyenv init-)"

3 Let the new configuration item take effect

SOURCE ~/.bash_profile

4 test if it is installed and view the version that can be installed

Pyenv install-l

5 Installing Python3

My current latest version of Python is 3.6.4. You can install it according to the latest version shown in the previous code.

Pyenv Install 3.6.4

6 switch version to 3.6.4

$ pyenv Global 2.7.3  # Sets the global Python version by writing the version number to the ~/.pyenv/version file. $ pyenv Local 2.7.3 # Sets the Python native version by writing the version number to the. python-version file in the current directory. The Python version set in this way has a higher priority than global.

7 printing the current Python version

Import Sys
Print (sys.version)
Print (Sys.version_info)

Mac OS uses pyenv to manage Python multiple versions