_logger must be assigned before any try..excepts use it.

Author: mickp

microscope/filterwheels/aurox.py

@@ -38,14 +38,16 @@
 import microscope.devices
 from typing import Mapping
 from enum import IntEnum
+
+_logger = logging.getLogger(__name__)
+
 try:
     # Currently, clarity_process is a module that is not packaged, so needs
     # to be put on the python path somewhere manually.
     from clarity_process import ClarityProcessor
 except:
     _logger.warning("Could not import clarity_process module: no processing available.")
 
-_logger = logging.getLogger(__name__)
 
 Mode = IntEnum("Mode", "difference, raw, calibrate")