python context switch

Reference from: https://blog.csdn.net/Tyro_java/article/details/78510301

Use homebrew, BerkeleyCS61B classroom teacher recommended https://sp19.datastructur.es/#cal

 

1. Open the file (empty directly write)

vi ~ / .bash_profile 

 

2. Modify the contents

alias python2="/usr/bin/python"

alias python3="/usr/local/bin/python3"

alias python=python3

 

3. This must be done (with the entry into force)

source ~/.bash_profile

 

ps: 2 then switch back

alias python2="/usr/bin/python"

alias python3="/usr/local/bin/python3"

alias python=python2