klippy: Rename try_load_module() to load_object()

Rename try_load_module() so that it uses consistent naming for
"printer objects".  Change the function to raise an error by default
if the specified module does not exist.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/extras/display/display.py

@@ -30,7 +30,7 @@ class DisplayTemplate:
                 raise config.error(
                     "Option '%s' in section '%s' is not a valid literal" % (
                         option, config.get_name()))
-        gcode_macro = self.printer.try_load_module(config, 'gcode_macro')
+        gcode_macro = self.printer.load_object(config, 'gcode_macro')
         self.template = gcode_macro.load_template(config, 'text')
     def render(self, context, **kwargs):
         params = dict(self.params)
@@ -58,7 +58,7 @@ class DisplayGroup:
         # Load all templates and store sorted by display position
         configs_by_name = {c.get_name(): c for c in data_configs}
         printer = config.get_printer()
-        gcode_macro = printer.try_load_module(config, 'gcode_macro')
+        gcode_macro = printer.load_object(config, 'gcode_macro')
         self.data_items = []
         for row, col, name in sorted(items):
             c = configs_by_name[name]
@@ -88,7 +88,7 @@ class PrinterLCD:
         if name == 'display':
             # only load menu for primary display
             self.menu = menu.MenuManager(config, self.lcd_chip)
-        self.printer.try_load_module(config, "display_status")
+        self.printer.load_object(config, "display_status")
         # Configurable display
         self.display_templates = {}
         self.display_data_groups = {}

klippy/extras/display/menu.py

@@ -1019,7 +1019,7 @@ class MenuManager:
         self._last_encoder_cw_eventtime = 0
         self._last_encoder_ccw_eventtime = 0
         # printer objects
-        self.buttons = self.printer.try_load_module(config, "buttons")
+        self.buttons = self.printer.load_object(config, "buttons")
         # register itself for printer callbacks
         self.printer.add_object('menu', self)
         self.printer.register_event_handler("klippy:ready", self.handle_ready)