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Pyenv install and ussage

Install

$ sudo apt-get install -y build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev python3-openssl git
$ curl https://pyenv.run | bash

If we are using ZSH then we will now add the proper lines to our .zshrc.

$ echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.zshrc
$ echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.zshrc
$ echo -e 'if command -v pyenv 1>/dev/null 2>&1; then\n eval "$(pyenv init -)"\nfi' >> ~/.zshrc

Restart your shell so the path changes take effect:

$ exec $SHELL

Check python available versions:

$ pyenv versions

* system (set by /home/kali/.pyenv/version)

We can now install Python 2 and Python 3 versions:

$ pyenv install 2.7.18

Downloading Python-2.7.18.tar.xz...
-> https://www.python.org/ftp/python/2.7.18/Python-2.7.18.tar.xz
Installing Python-2.7.18...
Installed Python-2.7.18 to /home/kali/.pyenv/versions/2.7.18

$ pyenv install 3.9.2

Downloading Python-3.9.2.tar.xz...
-> https://www.python.org/ftp/python/3.9.2/Python-3.9.2.tar.xz
Installing Python-3.9.2...
Installed Python-3.9.2 to /home/kali/.pyenv/versions/3.9.2

kali@kali:~$ pyenv versions

* system (set by /home/kali/.pyenv/version)
  2.7.18
  3.9.2

Set python 2.7.18:

$ pyenv global 2.7.18
$ pyenv versions

  system
* 2.7.18 (set by /home/kali/.pyenv/version)
  3.9.2

Installation Location

$ ls ~/.pyenv/versions/

2.7.18  3.9.2

Removing versions:

$ rm -rf ~/.pyenv/versions/2.7.15
$ pyenv uninstall 2.7.15

Usage:

use version 2.7.18:

$ pyenv global 2.7.18

use python system’s version:

$ pyenv global system

You can see a complete list of all available commands with:

$ pyenv commands
$ pyenv command --help

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