mac下python2升级到python3

1.下载python最新版本

🔗链接：https://www.python.org/downloads/mac-osx/

安装默认位置为： /Library/Frameworks/Python.framework/Versions/3.5/

2.打开终端，修改~/.bash_profile文件

# Setting PATH for Python 3.6
# The original version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.6/bin:${PATH}"
export PATH

alias python="/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6"

3.重启终端或执行

source ~/.bash_profile