Fix TypeError preventing script to launch

TypeError: argument should be integer or bytes-like object, not 'str'

examples/compensated-temperature.py

@@ -32,7 +32,7 @@
 def get_cpu_temperature():
     process = Popen(['vcgencmd', 'measure_temp'], stdout=PIPE)
     output, _error = process.communicate()
-    return float(output[output.index('=') + 1:output.rindex("'")])
+    return float(output[output.index(ord('=')) + 1:output.rindex(ord("'"))])
 
 
 factor = 1.0  # Smaller numbers adjust temp down, vice versa