Change to default python3 version on Raspberry Pi OS:
sudo update-alternatives --install /usr/bin/python python /usr/bin/python2.7 1 sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.7 2 # check the list sudo update-alternatives --list python /usr/bin/python2.7 /usr/bin/python3.7 # Change the default version sudo update-alternatives --config python There are 2 choices for the alternative python (providing /usr/bin/python). Selection Path Priority Status ------------------------------------------------------------ * 0 /usr/bin/python3.7 2 auto mode 1 /usr/bin/python2.7 1 manual mode 2 /usr/bin/python3.7 2 manual mode Press <enter> to keep the current choice[*], or type selection number: # now Python 3 is default python Python 3.7.3 (default, Jul 25 2020, 13:03:44) [GCC 8.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>>
Source: Change default python version on Raspbian GNU/Linux – LinuxConfig.org