General update to Python v3.9, etc.

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.8-slim-buster
+FROM python:3.9-slim-bullseye
 
 # Keeps Python from generating .pyc files in the container
 ENV PYTHONDONTWRITEBYTECODE 1

get_data.py

@@ -7,7 +7,7 @@ from socket import gaierror
 from typing import TypedDict
 
 import bluetooth._bluetooth as bluez  # type: ignore[import]
-import paho.mqtt.publish as publish  # type: ignore[import]
+from paho.mqtt import publish  # type: ignore[import]
 
 from bluetooth_utils.bluetooth_utils import (  # type: ignore[import]
     disable_le_scan,

requirements.txt

@@ -1,2 +1,2 @@
 paho-mqtt
-pybluez
+pybluez @ git+https://github.com/pybluez/pybluez.git#egg=pybluez