optionalize pyspin

Author: rickwierenga

pylabrobot/plate_reading/biotek_backend.py

@@ -13,7 +13,6 @@
 try:
   import PySpin # can be downloaded from 
   # https://www.teledynevisionsolutions.com/products/spinnaker-sdk/
-  import numpy as np
   USE_PYSPIN = True
 except ImportError:
   USE_PYSPIN = False 
@@ -25,6 +24,12 @@
 logger = logging.getLogger("pylabrobot.plate_reading.biotek")
 
 
+
+SPINNAKER_COLOR_PROCESSING_ALGORITHM_HQ_LINEAR = PySpin.SPINNAKER_COLOR_PROCESSING_ALGORITHM_HQ_LINEAR if USE_PYSPIN else -1
+PixelFormat_Mono8 = PySpin.PixelFormat_Mono8 if USE_PYSPIN else -1
+
+
+
 class Cytation5Backend(ImageReaderBackend):
   """Backend for biotek cytation 5 image reader.
 
@@ -583,8 +588,8 @@ async def set_imaging_mode(self, mode: ImagingMode) -> bool:
 
   async def _acquire_image(
     self,
-    color_processing_algorithm: int = PySpin.SPINNAKER_COLOR_PROCESSING_ALGORITHM_HQ_LINEAR,
-    pixel_format: int = PySpin.PixelFormat_Mono8,
+    color_processing_algorithm: int = SPINNAKER_COLOR_PROCESSING_ALGORITHM_HQ_LINEAR,
+    pixel_format: int = PixelFormat_Mono8,
   ) -> List[List[float]]:
     nodemap = self.cam.GetNodeMap()
 
@@ -631,8 +636,8 @@ async def capture(
     exposure_time: Exposure,
     focal_height: FocalHeight,
     gain: Gain,
-    color_processing_algorithm: int = PySpin.SPINNAKER_COLOR_PROCESSING_ALGORITHM_HQ_LINEAR,
-    pixel_format: int = PySpin.PixelFormat_Mono8,
+    color_processing_algorithm: int = SPINNAKER_COLOR_PROCESSING_ALGORITHM_HQ_LINEAR,
+    pixel_format: int = PixelFormat_Mono8,
   ) -> List[List[float]]:
     """Capture image using the microscope