Typing

src/errors/error_producer.py

@@ -8,14 +8,14 @@ class ErrorProducer:
     Specifies the report_error and collect_errors methods in a thread-safe manner.
     """
 
-    errors: list[Exception] = None
-    errors_lock: Lock = None
+    errors: list[Exception]
+    errors_lock: Lock
 
     def __init__(self) -> None:
         self.errors = []
         self.errors_lock = Lock()
 
-    def report_error(self, error: Exception):
+    def report_error(self, error: Exception) -> None:
         """Report an error"""
         with self.errors_lock:
             self.errors.append(error)

src/errors/friendly_error.py

@@ -1,4 +1,4 @@
-from typing import Iterable
+from typing import Iterable, Optional
 
 
 class FriendlyError(Exception):
@@ -27,8 +27,8 @@ class FriendlyError(Exception):
         self,
         title: str,
         subtitle: str,
-        title_args: Iterable[str] = None,
-        subtitle_args: Iterable[str] = None,
+        title_args: Optional[Iterable[str]] = None,
+        subtitle_args: Optional[Iterable[str]] = None,
     ) -> None:
         """Create a friendly error