Mac 升级 Python2.7 到 Python3.5

1、去 Python 官网下载一个版本的包 https://www.python.org/downloads/mac-osx/

2、安装之后，去  /Library/Frameworks/Python.framework/Versions/3.5 下检查一下是不是多了一个3.5

如果没有就在/System/Library/Frameworks/Python.framework/Versions/3.5

3、vi ~/.base_profile

把 2.7 的版本注释掉 加上 3.5的。如下：

# Setting PATH for Python 2.7

# The original version is saved in .bash_profile.pysave

#PATH="/Library/Frameworks/Python.framework/Versions/2.7/bin:${PATH}"

#export PATH

#export PATH=/usr/local/bin:$PATH

# Setting PATH for Python 3.5

# The original version is saved in .bash_profile.pysave

PATH="/Library/Frameworks/Python.framework/Versions/3.5/bin:${PATH}"

export PATH

export PATH=/usr/local/bin:$PATH

alias python="/Library/Frameworks/Python.framework/Versions/3.5/bin/python3.5"

4、使路径生效

source ~/.bash_profile