Refactor

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

panels/printer_select.py

@@ -38,7 +38,7 @@ class PrinterSelect(ScreenPanel):
 
         for i, printer in enumerate(printers):
             name = list(printer)[0]
-            self.labels[name] = self._gtk.ButtonImage("extruder", name, "color%s" % (1 + i % 4))
+            self.labels[name] = self._gtk.ButtonImage("extruder", name, f"color{1 + i % 4}")
             self.labels[name].connect("clicked", self._screen.connect_printer_widget, name)
             if self._screen.vertical_mode:
                 row = i % columns