Mac安裝升級python

1.如果有別的不需要的版本可以卸載，例如卸載3.6，安裝3.7

1.1 刪除Python 3.6 framework

sudo rm -rf /Library/Frameworks/Python.framework/Versions/3.6

1.2 刪除Python 3.6 應用目錄

sudo rm -rf "/Applications/Python 3.6"

1.3 刪除/usr/local/bin 目錄下指向的Python3.6的連接

cd /usr/local/bin/
ls -l /usr/local/bin | grep '../Library/Frameworks/Python.framework/Versions/3.6' | awk '{print $9}' | tr -d @ | xargs rm

2.安裝python3.7

2.1 在官網上下載pkg，點擊安裝
2.2 檢查.bash_profile

open -e .bash_profile // 打開

內容為：

# Setting PATH for Python 3.7
# The original version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.7/bin:${PATH}"
export PATH

注意：如果之前里面有3.6的需要刪掉，然后

source .bash_profile