Mac 环境中既有自带的 Python2.7 也有自己安装的 Python 3.5.1,默认想用 Python3 的环境
1. 添加 Python3 的环境变量
vi ~/.bash_profile
# 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
2. 添加别名
vi ~/.bashrc
alias python="/Library/Frameworks/Python.framework/Versions/3.5/bin/python3.5"
3. 立即生效
source .bash_profile