Fix reading of Transducer impulse_dt #380 #381

It was wrongly being converted to list

Author: ebrahimebrahim

src/openlifu/xdc/transducer.py

@@ -287,8 +287,6 @@ def to_dict(self):
             d["impulse_response"] = d["impulse_response"].tolist()
         if self.impulse_dt is None:
             del d["impulse_dt"]
-        else:
-            d["impulse_dt"] = d["impulse_dt"].tolist()
         d["standoff_transform"] =  d["standoff_transform"].tolist()
         return d
 

tests/resources/example_db/transducers/example_transducer_array/example_transducer_array.json

@@ -35,6 +35,8 @@
         [0.0, 0.0, 1.0, 0.0],
         [0.0, 0.0, 0.0, 1.0]
       ],
+      "impulse_response": [1000.0, 1000.0],
+      "impulse_dt": 1,
       "sensitivity": 1200,
       "module_invert": [false],
       "transform": [
@@ -76,6 +78,8 @@
         [0.0, 0.0, 1.0, 0.0],
         [0.0, 0.0, 0.0, 1.0]
       ],
+      "impulse_response": [1000.0, 1000.0],
+      "impulse_dt": 1,
       "sensitivity": 1000,
       "module_invert": [false],
       "transform": [