Make magnetic field and temperature optional

pyzebra/app/panel_hdf_viewer.py

@@ -83,8 +83,15 @@ def create():
             image_glyph.color_mapper.low = im_min
             image_glyph.color_mapper.high = im_max
 
-        magnetic_field_spinner.value = det_data["magnetic_field"][index]
-        temperature_spinner.value = det_data["temperature"][index]
+        if "magnetic_field" in det_data:
+            magnetic_field_spinner.value = det_data["magnetic_field"][index]
+        else:
+            magnetic_field_spinner.value = None
+
+        if "temperature" in det_data:
+            temperature_spinner.value = det_data["temperature"][index]
+        else:
+            temperature_spinner.value = None
 
         gamma, nu = calculate_pol(det_data, index)
         omega = np.ones((IMAGE_H, IMAGE_W)) * det_data["rot_angle"][index]

pyzebra/h5.py

@@ -60,7 +60,12 @@ def read_detector_data(filepath):
         det_data["chi_angle"] = h5f["/entry1/sample/chi"][:]  # ch
         det_data["phi_angle"] = h5f["/entry1/sample/phi"][:]  # ph
         det_data["UB"] = h5f["/entry1/sample/UB"][:].reshape(3, 3)
-        det_data["magnetic_field"] = h5f["/entry1/sample/magnetic_field"][:]
-        det_data["temperature"] = h5f["/entry1/sample/temperature"][:]
+
+        # optional parameters
+        if "/entry1/sample/magnetic_field" in h5f:
+            det_data["magnetic_field"] = h5f["/entry1/sample/magnetic_field"][:]
+
+        if "/entry1/sample/temperature" in h5f:
+            det_data["temperature"] = h5f["/entry1/sample/temperature"][:]
 
     return det_data