[h52nx] improve robustness when check if some parameter as already be defined

nxtomomill/converter/hdf5/acquisition/standardacquisition.py

@@ -541,8 +541,15 @@ class StandardAcquisition(BaseAcquisition):
     def _write_beam(self, root_node, request_input, input_callback):
         instrument_node = root_node.require_group("instrument")
         beam_node = instrument_node.require_group("beam")
-        if "energy" in self.configuration.param_already_defined:
-            energy = float(self.configuration.param_already_defined["energy"])
+        if (
+            TomoHDF5Config.EXTRA_PARAMS_ENERGY_DK
+            in self.configuration.param_already_defined
+        ):
+            energy = float(
+                self.configuration.param_already_defined[
+                    TomoHDF5Config.EXTRA_PARAMS_ENERGY_DK
+                ]
+            )
             unit = "kev"
         else:
             energy, unit = self._get_energy(
@@ -583,9 +590,14 @@ class StandardAcquisition(BaseAcquisition):
         # write x and y pixel size
         # if magnified pixel size is found then we right this value.
         # otherwise will take pixel size (if found)
-        if "x_pixel_size" in self.configuration.param_already_defined:
+        if (
+            TomoHDF5Config.EXTRA_PARAMS_X_PIXEL_SIZE_DK
+            in self.configuration.param_already_defined
+        ):
             x_pixel_size = float(
-                self.configuration.param_already_defined["x_pixel_size"]
+                self.configuration.param_already_defined[
+                    TomoHDF5Config.EXTRA_PARAMS_X_PIXEL_SIZE_DK
+                ]
             )
             unit = "m"
         else:
@@ -594,9 +606,14 @@ class StandardAcquisition(BaseAcquisition):
             detector_node["x_pixel_size"] = x_pixel_size
             detector_node["x_pixel_size"].attrs["unit"] = unit
 
-        if "y_pixel_size" in self.configuration.param_already_defined:
+        if (
+            TomoHDF5Config.EXTRA_PARAMS_Y_PIXEL_SIZE_DK
+            in self.configuration.param_already_defined
+        ):
             y_pixel_size = float(
-                self.configuration.param_already_defined["y_pixel_size"]
+                self.configuration.param_already_defined[
+                    TomoHDF5Config.EXTRA_PARAMS_Y_PIXEL_SIZE_DK
+                ]
             )
             unit = "m"
         else: