fixed some more ruff issues

Author: anmolbhatia05

pyparamgui/__init__.py

@@ -10,3 +10,16 @@
 from pyparamgui.widget import widget
 
 __all__ = ["widget", "setup_widget_observer"]
+
+"""
+Package Usage:
+    # considering that each command is run in a separate jupyter notebook cell
+
+    %env ANYWIDGET_HMR=1
+
+    from pyparamgui import widget, setup_widget_observer
+
+    widget
+
+    setup_widget_observer()
+"""

pyparamgui/generator.py

@@ -228,9 +228,7 @@ def generate_model(*, generator_name: str, generator_arguments: GeneratorArgumen
             f"Unknown model generator '{generator_name}'. "
             f"Known generators are: {list(generators.keys())}"
         )
-        raise ValueError(
-            msg
-        )
+        raise ValueError(msg)
     model = generators[generator_name](**generator_arguments)
     return Model.create_class_from_megacomplexes(
         [DecayParallelMegacomplex, DecaySequentialMegacomplex, SpectralMegacomplex]
@@ -269,8 +267,6 @@ def generate_model_yml(*, generator_name: str, generator_arguments: GeneratorArg
             f"Unknown model generator '{generator_name}'. "
             f"Known generators are: {list(generators.keys())}"
         )
-        raise ValueError(
-            msg
-        )
+        raise ValueError(msg)
     model = generators[generator_name](**generator_arguments)
     return cast(str, write_dict(model))