diff --git a/CAL/CalibrationCommon/lib/datacontainers/holography_dataset.py b/CAL/CalibrationCommon/lib/datacontainers/holography_dataset.py
index 18978cca77329c13e23e7c9ca642c02b870ee0a3..6d3d573830cdcda1ce45c384ea668a0ff7ac41d0 100644
--- a/CAL/CalibrationCommon/lib/datacontainers/holography_dataset.py
+++ b/CAL/CalibrationCommon/lib/datacontainers/holography_dataset.py
@@ -67,6 +67,7 @@ class HolographyDataset():
                     result = result and HolographyDataset.compare_dicts(dict1[key], dict2[key])
                 else:
                     if isinstance(dict1[key], numpy.ndarray) and isinstance(dict2[key], numpy.ndarray):
+                        # Compares element by element the two arrays
                         return numpy.array_equal(dict1[key], dict2[key])
                     else:
                         return dict1[key] == dict2[key]
@@ -242,7 +243,7 @@ class HolographyDataset():
                 self.ra_dec[frequency_string] = dict()
             for beamlet in self.beamlets:
                 beamlet_string = str(beamlet)
-                self.ra_dec[frequency_string][beamlet_string] = numpy.array( \
+                self.ra_dec[frequency_string][beamlet_string] = numpy.array(
                     virtual_pointing[(frequency, beamlet)],
                     dtype=coordinate_type)
 
@@ -251,7 +252,7 @@ class HolographyDataset():
         # and does this only once since the coordinate will not change
         first_holography_observation = list_of_hbs_ho_tuples[0][1]
         first_ms = first_holography_observation.ms_for_a_given_beamlet_number.values()[0]
-        station_position, tile_offset, axes_coordinates  = first_ms.\
+        station_position, tile_offset, axes_coordinates = first_ms.\
             get_station_position_tile_offsets_and_axes_coordinate_for_station_name(
             station_name)
 
@@ -388,7 +389,7 @@ class HolographyDataset():
 
             # Moan...  Again this needs to be stored like that.
             f.attrs[HDS_SAS_ID] = numpy.array(self.sas_ids,
-                                              dtype = h5py.special_dtype(vlen = str))
+                                              dtype = h5py.special_dtype(vlen=str))
             f.attrs[HDS_TARGET_STATION_NAME] = self.target_station_name
             f.attrs[HDS_TARGET_STATION_POSITION] = self.target_station_position
             f.attrs[HDS_SOURCE_NAME] = self.source_name
@@ -398,7 +399,7 @@ class HolographyDataset():
                                            ('EPOCH', 'S10')])
             
             f.attrs[HDS_SOURCE_POSITION] = numpy.array(self.source_position,
-                                                       dtype = coordinate_type)
+                                                       dtype=coordinate_type)
             f.attrs[HDS_OBSERVATION_TIME] = numpy.array([self.start_time, self.end_time])
             f.attrs[HDS_ROTATION_MATRIX] = self.rotation_matrix
             f.attrs[HDS_ANTENNA_FIELD_POSITION] = self.antenna_field_position