In CodeExercise rename update_func to update (#85)

This way the meaning of the `run_update` function should be clearer and
is less to type.

src/scwidgets/exercise/_widget_code_exercise.py

@@ -54,7 +54,7 @@ class CodeExercise(VBox, CheckableWidget, ExerciseWidget):
     :param outputs:
         List of CueOuputs that are drawn and refreshed
 
-    :param update_func:
+    :param update:
         A function that is run during the update process. The function takes as argument
         the CodeExercise, so it can update all cue_ouputs
 
@@ -71,7 +71,7 @@ def __init__(
         ] = None,
         update_mode: str = "manual",
         outputs: Union[None, Figure, CueOutput, List[CueOutput]] = None,
-        update_func: Optional[
+        update: Optional[
             Union[
                 Callable[[CodeExercise], Union[Any, Check.FunOutParamsT]],
                 Callable[[], Union[Any, Check.FunOutParamsT]],
@@ -95,20 +95,22 @@ def __init__(
                 Callable[[CodeExercise], Union[Any, Check.FunOutParamsT]],
                 Callable[[], Union[Any, Check.FunOutParamsT]],
             ]
-        ] = update_func
+        ] = update
 
+        # We test update instead of self._update_func because self._update_func
+        # has one additional argument because of self
         self._update_func_nb_nondefault_args: Optional[int]
-        if update_func is not None:
+        if update is not None:
             self._update_func_nb_nondefault_args = len(
                 [
                     value
-                    for value in inspect.signature(update_func).parameters.values()
+                    for value in inspect.signature(update).parameters.values()
                     if not isinstance(value.default, inspect._empty)
                 ]
             )
             if self._update_func_nb_nondefault_args > 1:
                 raise ValueError(
-                    f"The given update_func has "
+                    f"The given update function has "
                     f"{self._update_func_nb_nondefault_args} parameters without "
                     "defaults, but only zero or one are supported."
                 )
@@ -160,7 +162,7 @@ def __init__(
 
         # check compability between code and params, can only be checked if
         # update_func is not used because we cannot know how the code input is used
-        if update_func is None and code is not None and params is not None:
+        if update is None and code is not None and params is not None:
             if isinstance(params, dict):
                 compatibility_result = code.compatible_with_signature(
                     list(params.keys())

tests/test_code.py

@@ -156,7 +156,7 @@ def update_print(code_ex: CodeExercise):
         check_registry=CheckRegistry() if include_checks is True else None,
         params=parameters if include_params is True else None,
         outputs=[CueObject("Not initialized")],
-        update_func=update_print,
+        update=update_print,
         update_mode=update_mode,
     )
 
@@ -291,7 +291,7 @@ def print_success(code_ex: CodeExercise | None):
             exercise_registry=exercise_registry,
             exercise_key="test_save_registry_ex",
             outputs=[cue_output],
-            update_func=print_success,
+            update=print_success,
         )
 
         exercise_registry._student_name_text.value = "test_save_registry-student_name"
@@ -341,11 +341,11 @@ def failing_update(a, b):
             pass
 
         with pytest.raises(
-            ValueError, match=r".*The given update_func has 2 parameters .*"
+            ValueError, match=r".*The given update function has 2 parameters .*"
         ):
             CodeExercise(
                 code=TestCodeInput.mock_function_0,
-                update_func=failing_update,
+                update=failing_update,
             )
 
     def test_figure(self):