Satify mypy and flake8 in CI (but not for pre-commit)

Author: jonathanperret

src/main/python/main/ayab/engine/engine.py

@@ -112,7 +112,7 @@ def __populate_ports(self, port_list: Optional[list[str]] = None) -> None:
         combo_box.addItem(QCoreApplication.translate("KnitEngine", "Simulation"))
 
     def __read_portname(self) -> str:
-        return cast(str, self.ui.serial_port_dropdown.currentText())
+        return self.ui.serial_port_dropdown.currentText()
 
     def knit_config(self, image: Image.Image) -> None:
         """

src/main/python/main/main.py

@@ -21,13 +21,14 @@
 if TYPE_CHECKING:  # TODO: why does mypy not resolve the absolute import correctly?
     from main.ayab.ayab import GuiMain
     from main.ayab import utils
+
     # from https://github.com/python/typing/discussions/1102#discussioncomment-2376328
     cached_property = property
 else:
     try:
         from main.ayab.ayab import GuiMain
         from main.ayab import utils
-    except: #'fbs run' needs weird things.
+    except ModuleNotFoundError:  # 'fbs run' needs weird things.
         from ayab.ayab import GuiMain
         from ayab import utils
     from fbs_runtime.application_context.PySide6 import cached_property