python2和python3共存windows

安装python2和python3区分目录 都放入到系统变量Path中 C:\Users\w\.windows-build-tools\python27 C:\Users\w\.windows-build-tools\python27\Script C:\Users\w\.windows-build-tools\python3 C:\Users\w\.windows-build-tools\python3\Script

给C:\Users\w\.windows-build-tools\python27下的python.exe复制一份改名python2.exe即可 powershell测试 python -V 和 python2 -V

mac m1

python2

# 通过brew安装python2
brew install pyenv
brew install zlib

# 下面两个试试哪个没报错用哪个
pyenv install 2.7.18
# arch -x86_64 pyenv install 2.7.18
# 配置环境
echo 'PATH=$(pyenv root)/shims:$PATH' >> ~/.zshrc
pyenv global 2.7.18

# 也可以直接配置别名实用
open ~/.zshrc
alias python2='/Users/w/.pyenv/versions/2.7.18/bin/python'
source ~/.zshrc