Replace not x in y with x not in y

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

src/frequenz/sdk/actor/power_distributing/power_distributing.py

@@ -217,7 +217,7 @@ async def _send_result(self, namespace: str, result: Result) -> None:
             namespace: namespace of the sender, to identify the result channel with.
             result: Result to send out.
         """
-        if not namespace in self._result_senders:
+        if namespace not in self._result_senders:
             self._result_senders[namespace] = self._channel_registry.new_sender(
                 namespace
             )

src/frequenz/sdk/timeseries/_quantities.py

@@ -61,7 +61,7 @@ def __init_subclass__(cls, exponent_unit_map: dict[int, str]) -> None:
             ValueError: If the given exponent_unit_map does not contain a base unit
                 (exponent 0).
         """
-        if not 0 in exponent_unit_map:
+        if 0 not in exponent_unit_map:
             raise ValueError("Expected a base unit for the type (for exponent 0)")
         cls._exponent_unit_map = exponent_unit_map
         super().__init_subclass__()