Allow zero-length data products to be merged

DeepLearnPhysics · Jul 17, 2023 · ed62f8b · ed62f8b
1 parent 953bc86
commit ed62f8b
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/bin/merge_larcv3_files.py b/bin/merge_larcv3_files.py
@@ -125,8 +125,11 @@ def copy_data_product(input_file, output_file, group_name):
       if 'extents' in dataset:
 
         # Get the offsets for the new table before resizing:
-        existing_offset = output_table['first'][-1]+ output_table['N'][-1]
         index = len(output_table)
+        if index != 0:
+          existing_offset = output_table['first'][-1]+ output_table['N'][-1]
+        else:
+          existing_offset = 0