renaming bands after merging ok

merge_rename_bands_algorithm.py

@@ -144,19 +144,22 @@ class MergeAndRenameAlgorithm(QgsProcessingAlgorithm):
                 'SEPARATE' : True,
                 'OUTPUT' : output_raster_path
                 }
-        merge_result = processing.run("gdal:merge", merge_param, context=context, feedback=feedback)
-
-#        
-#        # RENAMING BANDS
-#            
-#        # iterate over each band to set its description using table input
-#        for band_number in range(nb_row):
-#            band = output_raster.GetRasterBand(band_number + 1)
-#            new_name = band_table[band_number][index_newname]
-#            # if no new name was set, use old name
-#            if new_name == '':
-#                new_name = band_table[band_number][index_oldname]
-#            band.SetDescription(new_name)
+        processing.run("gdal:merge", merge_param, context=context, feedback=feedback)
+
+        
+        # RENAMING BANDS
+        
+        # reading merged raster as a gdal raster
+        merged_raster = gdal.Open(output_raster_path)
+        # iterate over each band to set its description using table input
+        for band_number in range(nb_row):
+            band = merged_raster.GetRasterBand(band_number + 1)
+            new_name = band_table[band_number][index_newname]
+            # if no new name was set, use old name
+            if new_name == '':
+                new_name = band_table[band_number][index_oldname]
+            band.SetDescription(new_name)
+            
             
         # RETURNING RESULTS