Make style changes and complexity to example transducer tracking result (OpenwaterHealth#182)

Author: sadhana-r

src/openlifu/db/session.py

@@ -103,7 +103,7 @@ class Session:
     only. None of the other transforms in the list are considered to be approved.
     """
 
-    transducer_tracking_results: Optional[List[TransducerTrackingResult]] = field(default_factory=list)
+    transducer_tracking_results: List[TransducerTrackingResult] = field(default_factory=list)
     """List of any transducer tracking results"""
 
     def __post_init__(self):
@@ -150,10 +150,15 @@ def from_dict(d:Dict):
         if 'array_transform' in d:
             d['array_transform'] = ArrayTransform(np.array(d['array_transform']['matrix']), d['array_transform']['units'])
         if 'transducer_tracking_results' in d:
-            d['transducer_tracking_results'] = [TransducerTrackingResult(t['photoscan_id'],
-                                                                         ArrayTransform(np.array(t['transducer_to_photoscan_transform']['matrix']),t['transducer_to_photoscan_transform']['units']),
-                                                                         ArrayTransform(np.array(t['photoscan_to_volume_transform']['matrix']), t['photoscan_to_volume_transform']['units']),
-                                                                         t['transducer_tracking_approved']) for t in d['transducer_tracking_results']]
+            d['transducer_tracking_results'] = [
+                TransducerTrackingResult(
+                    t['photoscan_id'],
+                    ArrayTransform(np.array(t['transducer_to_photoscan_transform']['matrix']),t['transducer_to_photoscan_transform']['units']),
+                    ArrayTransform(np.array(t['photoscan_to_volume_transform']['matrix']), t['photoscan_to_volume_transform']['units']),
+                    t['transducer_tracking_approved']
+                    )
+                    for t in d['transducer_tracking_results']
+                    ]
         if isinstance(d['targets'], list):
             if len(d['targets'])>0 and isinstance(d['targets'][0], dict):
                 d['targets'] = [Point.from_dict(p) for p in d['targets']]

tests/resources/example_db/subjects/example_subject/sessions/example_session/example_session.json

@@ -48,17 +48,17 @@
       "photoscan_id": "example_photoscan",
       "transducer_to_photoscan_transform": {
         "matrix": [
-          [1.0, 0.0, 0.0, 0.0],
-          [0.0, 1.0, 0.0, 0.0],
+          [2.0, 0.5, 0.0, 0.0],
+          [-0.5, 2.0, 0.0, 0.0],
           [0.0, 0.0, 1.0, 0.0],
           [0.0, 0.0, 0.0, 1.0]
         ],
         "units": "mm"
       },
       "photoscan_to_volume_transform": {
         "matrix": [
-          [1.0, 0.0, 0.0, 0.0],
-          [0.0, 1.0, 0.0, 0.0],
+          [1.0, 0.0, 3.0, 0.0],
+          [0.0, 1.0, 2.0, 0.0],
           [0.0, 0.0, 1.0, 0.0],
           [0.0, 0.0, 0.0, 1.0]
         ],