improved code style a bit

Signed-off-by: Christoph Massmann <[email protected]>

.github/workflows/verify-plugin-scripts.yml

@@ -23,7 +23,7 @@ jobs:
         pip install -r requirements.txt
     - name: Analysing the code with pylint
       run: |
-        pylint --errors-only $(find . -name "*.py" | xargs)
+        pylint --errors-only $(find src/ -name "*.py" | xargs)
     - name: Running tests
       run: |
         pytest --cov

src/fritzbox_file_session.py

@@ -6,8 +6,6 @@
 import os
 from typing import Optional
 
-NoneOrString = Optional[str]  # for Python 3.9 compatibility, since 3.10 you can type None | str
-
 def get_session_dir() -> str:
   return str(os.getenv('MUNIN_PLUGSTATE')) + '/fritzbox'
 
@@ -40,7 +38,7 @@ def save(self, session_id):
     with open(statefilename, 'w', encoding='utf8') as statefile:
       statefile.write(session_id)
 
-  def load(self) -> NoneOrString:
+  def load(self) -> Optional[str]:
     statefilename = get_session_dir() + '/' + self.__get_session_filename()
     if not os.path.exists(statefilename):
       return None