All good, no hard feelings here and I'm glad we could get this misunderstanding out of the way 
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Will I need to remove older versions of python? I’ve been getting weird update issues already from this issue with plugins.
No, OctoPrint is only concerned with the version of Python it's installed under - the others should not get in the way. I'm not aware of any issues with plugins getting confused like this - if you open your own get help topic we should be able to look into it.
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I agree apparently I am already on 3.9.2
Looking at my web interface I am on Connection
OctoPrint 1.7.3
Python 3.7.3
OctoPi 0.18.0
So just a case of updating to Octoprint 1.8.0 some how.
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For the record, OctoPrint 1.8.0 isn't released yet, so you can't yet update to it. Once it releases, anyone on Python 3 will get the usual update notification.
Anyone that ONLY has Python 2 installed at this point, after all the press, notifications, warning messages, etc. is going to end up with much more than Octoprint broken. It is just a matter of time. Glad you are taking some reasonable steps to avoid people breaking their Octoprint installs, but I think in the long run it might be better for them to have something they use break as a wake up call.
https://www.activestate.com/products/python/python-2-end-of-life-security-updates/
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Agreed, but tbh, I already get enough flak for hard decisions I have to make
Since the 2 years are regularly mentioned here: Note that upstream support != distro support: Many still supported Linux distribution versions ship (and hence support) Python 2 packages/sources and provide security and bug fix patches when needed. This is likely the reason why there is still a considerable large number of systems with Python 2 even installed.
But I totally agree that dropping Python 2 support for OctoPrint is highly welcome. Python 3 is available and shipped by distros since I can think. Sadly there are relevant projects out there which didn't even manage to support Python 3 until now 
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When will 1.8 be released ? cannot seem to find this info anywhere ?
can it not be pinned or added to the original post ?
will it be released in 1 month, 6 months, 1 year ?
We're aiming to start the release candidates very shortly, it's feature-frozen already with just a few bugs being worked out. After release canidates start it's usually around a month for the stable release to be rolled out.
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I am now on python 3.6.9, should I just remove the entire venv and reinstall OctoPrint once I upgrade my python3 to >= 3.7?
Because I tried just upgrading the python3, my OctoPrint will just crash!
Any advice will be appreciated.
Hi thanks for the reply.
I did try the script but it won't let me and kept prompting you are using python3. Is there any way to get around it?
OctoPrint requires python 3.7+, so you'll need a venv with that.
okay in the end I had to remove the venv built on 3.6.9 and install 3.7 then install python3.7-venv then go over the installation to have OctoPrint 1.8.0.
Many thanks
Are you aware that there appears to be a problem installing Octoscreen after upgrading Octopi using their Raspberry Pi Imager? If I follow your directions to insert the relevant lines in your post using Putty, I just go back to a sign in prompt on the Pi 7" screen.
@tjwitman - doesn't seem related to the original post here, which is about OctoPrint 1.8.0 requiring Python 3, there's no instructions to follow directly here.
I posted that as a new issue on the Zbolt/Octoscreen github????? No idea how it got here!!!!!