Use pyenv to manage Python version (qbit) under Ubuntu

foreword

• Software Environment

  Ubuntu Server 20.04 LTS
  bash  5.0.17
  pyenv 2.2.5

• pyenv github: https://github.com/pyenv/pyenv

install pyenv

• Install dependencies

sudo apt-get update; sudo apt-get install make build-essential libssl-dev zlib1g-dev \
libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm \
libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev

• Install

# git 克隆
git clone https://github.com/pyenv/pyenv.git ~/.pyenv
# 编译加速（可选）
 cd ~/.pyenv && src/configure && make -C src

• Add in ~/.profile

export PYENV_ROOT="$HOME/.pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
# 没有这句，下面的镜像 url 不生效
export PYTHON_BUILD_MIRROR_URL_SKIP_CHECKSUM=1
# 国内 Python 镜像
export PYTHON_BUILD_MIRROR_URL="https://mirrors.huaweicloud.com/python/"
# OR
export PYTHON_BUILD_MIRROR_URL="https://npm.taobao.org/mirrors/python/"
eval "$(pyenv init --path)"

• Add in ~/.bashrc

eval "$(pyenv init -)"

• restart the shell

exec $SHELL

Basic usage of pyenv

• View Installable Python Versions

pyenv install -l

• Install the specified version of Python

pyenv install 3.9.12 -v

• View installed Python versions

$ pyenv versions
* system (set by /home/qbit/.pyenv/version)
  3.6.15
  3.9.12

• Switch Python version

pyenv global 版本号  设置当前全局python版本
pyenv local  版本号  设置局部python版本
pyenv local --unset  取消局部python版本设置，或者删除当前目录下的.python-version文件

This article is from qbit snap