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I installed the Python 3.6.2 that can be downloaded from https://python.org/, but it's causing some trouble with the #!/usr/bin/env python3 instruction, which now uses 3.6 by default when I need it to use 3.5, since that is the version that has a bunch of libraries I need installed and pip3 still installs everything to 3.5.

The thing is, as I said, I installed it manually, and what could be worse, I did it with sudo make install instead of sudo make altinstall, so I don't know if Python 3.5 has been partially replaced or something.

Is there any way to remove Python 3.6 in these conditions? Alternatively, is there any way to get #!/usr/bin/env python3 to use Python 3.5, and to just forget about 3.6?

#!/usr/bin/env python3.5 works for using Python 3.5, and Python 3.5 can still be opened in the terminal, so I'd like to think I didn't mess with it, but I don't know.

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    Look at ls -l /usr/bin/python3* - if /usr/bin/python3 is just a symlink, you may be able tosimply point it at python3.5 – steeldriver Aug 19 '17 at 9:36
  • Have you tried sudo apt-get remove python3.6 anyway? – Nagev Sep 6 '17 at 10:00
  • What's the output of which python3 python3.5 python3.6 | xargs -rd '\n' -- ls -l --? – David Foerster Sep 27 '17 at 9:37

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