Mac和Linux将默认的Python版本指向Python3.x

首先安装python和python3

Linux 注意自己电脑python装的路径

which pip -> /usr/bin/python which pip3 -> /usr/bin/python3 sudo ln -s /usr/bin/python /usr/bin/python3

如果不行：

sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 1 sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 2

Mac

which pip -> path_pip which pip3 -> path_pip3 sudo ln -s path_pip path_pip3

如果不行，shift+alt+.，打开目录下的 在文件中输入以下内容：【注意path，用which命令去查查！】

#Setting PATH for Python 3.7 #The original version is saved in .bash_profile.pysave PATH="/usr/local/Cellar/python/3.7.0/bin:${PATH}" export PATH alias python="/usr/local/bin/python3" # Setting PATH for pip 3.7 export PATH="/Library/Frameworks/Python.framework/Versions/3.7/bin:$PATH"

保存之后：

source ~/.bash_profile #检查 python -V pip -V