Change python default version

CentOS

Python can be configured via alternatives on CentOS

List available versions ...

# alternatives --list | grep -i python

...and set it

# alternatives --config python

There are 2 programs which provide 'python'.

  Selection    Command
-----------------------------------------------
*+ 1           /usr/libexec/no-python
   2           /usr/bin/python3
   3           /usr/bin/python2

Enter to keep the current selection[+], or type selection number: 2

# python -V
Python 3.6.8

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