Small cleanups.

Author: johndoknjas

chess/engine.py

@@ -1532,7 +1532,7 @@ def start(self, engine: UciProtocol) -> None:
 
         return await self.communicate(UciConfigureCommand)
 
-    def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> ConfigMapping:
+    def _opponent_configuration(self, *, opponent: Optional[Opponent] = None) -> ConfigMapping:
         if opponent and opponent.name and "UCI_Opponent" in self.options:
             rating = opponent.rating or "none"
             title = opponent.title or "none"
@@ -1542,7 +1542,7 @@ def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine
             return {}
 
     async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
-        return await self.configure(self._opponent_configuration(opponent=opponent, engine_rating=engine_rating))
+        return await self.configure(self._opponent_configuration(opponent=opponent))
 
     def _position(self, board: chess.Board) -> None:
         # Select UCI_Variant and UCI_Chess960.
@@ -1932,7 +1932,7 @@ def _chain_config(a: ConfigMapping, b: ConfigMapping) -> Iterator[Tuple[str, Con
 class UciOptionMap(MutableMapping[str, T]):
     """Dictionary with case-insensitive keys."""
 
-    def __init__(self, data: Optional[Union[Iterable[Tuple[str, T]]]] = None, **kwargs: T) -> None:
+    def __init__(self, data: Optional[Iterable[Tuple[str, T]]] = None, **kwargs: T) -> None:
         self._store: Dict[str, Tuple[str, T]] = {}
         if data is None:
             data = {}
@@ -1948,7 +1948,7 @@ def __delitem__(self, key: str) -> None:
         del self._store[key.lower()]
 
     def __iter__(self) -> Iterator[str]:
-        return (casedkey for casedkey, mappedvalue in self._store.values())
+        return (casedkey for casedkey, _ in self._store.values())
 
     def __len__(self) -> int:
         return len(self._store)

chess/pgn.py

@@ -942,10 +942,7 @@ def __setitem__(self, key: str, value: str) -> None:
             self._others[key] = value
 
     def __getitem__(self, key: str) -> str:
-        if key in TAG_ROSTER:
-            return self._tag_roster[key]
-        else:
-            return self._others[key]
+        return self._tag_roster[key] if key in TAG_ROSTER else self._others[key]
 
     def __delitem__(self, key: str) -> None:
         if key in TAG_ROSTER:

chess/polyglot.py

@@ -391,11 +391,8 @@ def __getitem__(self, index: int) -> Entry:
         return Entry(key, raw_move, weight, learn, move)
 
     def __iter__(self) -> Iterator[Entry]:
-        i = 0
-        size = len(self)
-        while i < size:
+        for i in range(len(self)):
             yield self[i]
-            i += 1
 
     def bisect_key_left(self, key: int) -> int:
         lo = 0