refactor: adds type annotations reported by mypy and updated pylint version in .pre-commit-config.yaml

Author: Rich Saupe

.pre-commit-config.yaml

@@ -18,7 +18,7 @@ repos:
     -   id: end-of-file-fixer
     -   id: trailing-whitespace
 -   repo: https://github.com/pycqa/pylint
-    rev: v2.11.1
+    rev: v2.12.2
     hooks:
     -   id: pylint
         name: pylint (library code)

adafruit_ble_ibbq.py

@@ -41,7 +41,7 @@ class _SettingsResult(ComplexCharacteristic):
     def __init__(self):
         super().__init__(properties=Characteristic.NOTIFY)
 
-    def bind(self, service):
+    def bind(self, service: Service) -> _bleio.PacketBuffer:
         """Bind to an IBBQService."""
         bound_characteristic = super().bind(service)
         bound_characteristic.set_cccd(notify=True)
@@ -57,7 +57,7 @@ class _RealtimeData(ComplexCharacteristic):
     def __init__(self):
         super().__init__(properties=Characteristic.NOTIFY)
 
-    def bind(self, service):
+    def bind(self, service: Service) -> _bleio.PacketBuffer:
         """Bind to an IBBQService."""
         bound_characteristic = super().bind(service)
         bound_characteristic.set_cccd(notify=True)
@@ -74,7 +74,7 @@ class IBBQService(Service):
     _UNITS_CELSIUS_MSG = b"\x02\x00\x00\x00\x00\x00"
     _REQUEST_BATTERY_LEVEL_MSG = b"\x08\x24\x00\x00\x00\x00"
 
-    def __init__(self, service=None):
+    def __init__(self, service: Service = None) -> None:
         super().__init__(service=service)
         # Defer creating buffers until needed, since MTU is not known yet.
         self._settings_result_buf = None