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Making Python 3 default in Debian

edsheut
Oct 13th, 2020 (edited)
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  1. pi@raspberrypi:~ $ sudo apt install python3 idle3
  2. pi@raspberrypi:~ $ python --version
  3. Python 2.7.16
  4. pi@raspberrypi:~ $ update-alternatives --list python
  5. update-alternatives: error: no alternatives for python
  6. pi@raspberrypi:~ $ sudo update-alternatives --install /usr/bin/python python /usr/bin/python2.7 1
  7. update-alternatives: using /usr/bin/python2.7 to provide /usr/bin/python (python) in auto mode
  8. pi@raspberrypi:~ $ sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.7 2
  9. update-alternatives: using /usr/bin/python3.7 to provide /usr/bin/python (python) in auto mode
  10. pi@raspberrypi:~ $ update-alternatives --list python
  11. /usr/bin/python2.7
  12. /usr/bin/python3.7
  13. pi@raspberrypi:~ $ python --version
  14. Python 3.7.3
  15. pi@raspberrypi:~ $
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