Use f-strings
Avoid unnecessary casts to str()bool()int()
Ensure file closure
Merge nested ifs
Simplify for-assigns-appends with comprehensions and internal functions
Avoid shadowing internal function names
Initialize variables
Return value directly instead of assign then return
Make some methods static
fix axis sizes for high resolutions (tie to font_size)
fix update interval sometimes being faster (fix printer timer)
fix new device added causing horizontal line (use min not max)
