我已经安装了 python3.7，但是我不确定如何使它成为默认的 python。
见下文：
~/Documents/robosuite$ python3.7
Python 3.7.1 (default, Oct 22 2018, 11:21:55)
[GCC 8.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
KeyboardInterrupt
>>>
~/Documents/robosuite$ python3
Python 3.6.7 (default, Oct 22 2018, 11:32:17)
[GCC 8.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
我希望在使用命令时显示 python3.7 python3