home@orangepipc:~$ python3 --version
Python 3.7.0
home@orangepipc:~$ python --version
Python 2.7.12
home@orangepipc:~$ python
Python 2.7.12 (default, Dec 4 2017, 14:50:18)
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
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yeah you are right guys, i now know that armbian already included python as pre-install.
i guest i will google more about installing the interpreter and make python 3.7.0 as my default. Because i have these e-book about python 3 version not python 2 version.
thank you all for your reply.