Installing plugin fails on fresh Octopi 0.16.0

[fleibede]

Model: Raspberry Pi 3 Model B Rev 1.2
Applied OctoPi 0.16.0 image.
Updated to 1.3.11, installed plugins themeify, psucontrol and finally this plugin.

RuntimeError: Python version >= 3.5 required?

Should this not work out of the box on this setup? See pluginmanager log attached.
plugin_pluginmanager_console.log

[fleibede]

Same issue as #25

[amsbr]

Hi,

you tried run the commands of issue #24

[NUsulator]

i had to launch in SSH:
~/oprint/bin/pip --no-cache-dir install numpy
~/oprint/bin/pip --no-cache-dir install pandas

then i install the plugin

[padouk73]

after install numpy abd install pandas, reboot must be done, than go to plugin manager and install statistics plugin.
Works !

[redfox05]

+1 issue is still happening.
Octoprint Version 1.4.0 fresh install, on Raspberry Pi 3.

This needs a proper fix, manually installing packages on the command line is not good for a system like OctoPrint, as that can bring unexpected problems later on.

Example of why it's bad: Some threads recommend manually installing Python 3.5 or above, and this is BAD, because a lot of the OctoPrint system is not compatible with 3.x, so how does one know if the suggestions here are not going to cause other issues.

So, case in point, a proper fix is needed, to allow direct normal install via Plugin Manager.