Steps to install Pyenv under Deepin

Preface

In the past, I always switched Python versions by modifying the soft link in the /bin/ directory, which was very inconvenient and it was also very cumbersome to install a new Python version. I tried pyenv and instantly felt that it was really good. I recorded the installation process notes.

Install

Install dependent libraries

This step is required, otherwise the Python compiler will report a warning or exception, causing some extensions to be unusable, for example:

WARNING: The Python bz2 extension was not compiled. Missing the bzip2 lib?
WARNING: The Python readline extension was not compiled. Missing the GNU readline lib?
ERROR: The Python ssl extension was not compiled. Missing the OpenSSL lib?

Installation command:

# sudo apt install libssl-dev zlib1g-dev libbz2-dev \
     libreadline-dev libsqlite3-dev libffi-dev \
     libncurses5-dev libncursesw5-dev liblzma-dev

Install pyenv

download

# git clone https://github.com/yyuu/pyenv.git ~/.pyenv

Add the following to ~/.bashrc

export PATH=~/.pyenv/bin:$PATH
export PYENV_ROOT=~/.pyenv
eval "$(pyenv init -)"

Update environment variables

# source ~/.bashrc

Install Python

# pyenv install 3.8.5
Downloading Python-3.8.5.tar.xz...
-> https://www.python.org/ftp/python/3.8.5/Python-3.8.5.tar.xz

pyenv may download very slowly. You can copy the displayed download link, download it in the browser, and then put it in the ~/.pyenv/cache/ directory (the cache directory needs to be created manually), and then re-execute pyenv install 3.8.5

Switch Python environment

Query the currently installed Python version

# pyenv versions
* system (set by /home/zpzhou/.pyenv/version)
 3.8.5

Switch version

You can use the command pyenv global <version> to switch.

Before switching:

# python -V
Python 2.7.13

Switch:

# pyenv global 3.8.5

After switching:

# python -V
Python 3.8.5

Summarize

This is the end of this article about installing the artifact Pyenv under Deepin. For more information about installing the artifact Pyenv under Deepin, please search for previous articles on 123WORDPRESS.COM or continue to browse the following related articles. I hope you will support 123WORDPRESS.COM in the future!