improved code by mypy advice

governor.py

@@ -1,6 +1,6 @@
 from app_class import AppClass
 from config import Config
-from cpufreq import cpuFreq, cpufreq
+from cpufreq import cpuFreq, cpufreq  # type: ignore
 from functools import cached_property
 from mapping import governor_priority_mapping
 from exceptions import GovernorNotFound
@@ -46,6 +46,9 @@ class Governor(AppClass):
             self.log.warning("application is running in testmode, cpu governor not set")
             return None
         
+        if self._cpufreq is None:
+            return None
+        
         if governor_name not in self._cpufreq.available_governors:
             self.log.error("governor %s not supported by cpu", governor_name)
             return None

schedule.py

@@ -2,12 +2,13 @@ from app_class import AppClass
 from config import Config
 from trigger import Trigger
 import asyncio
+from asyncio import Task
 
 
 class TriggerScheduler(AppClass):
     def __init__(self, _config: Config) -> None:
         super().__init__(_config)
-        self.tasks = []
+        self.tasks: list[Task] = []
         
     async def trigger(self, _trigger: Trigger) -> None:
         """Run a trigger with a specific name at a given interval."""