Copy data to avoid overriding original sentence data

solar3.py

@@ -2,6 +2,7 @@ import logging
 import os
 import re
 import xml.etree.ElementTree as ET
+from copy import deepcopy
 from itertools import groupby
 from typing import Optional
 
@@ -223,7 +224,8 @@ class Solar3(datasets.GeneratorBasedBuilder):
             assert len(involved_src_sents) > 0 or len(involved_tgt_sents) > 0
 
             if len(involved_src_sents) > 0:
-                src_sent_data = source_data[involved_src_sents[0]]
+                src_sent_data = deepcopy(source_data[involved_src_sents[0]])
+
                 for src_sent_id in involved_src_sents[1:]:
                     curr_sent_data = source_data[src_sent_id]
                     src_sent_data["id_token"].extend(curr_sent_data["id_token"])
@@ -241,7 +243,8 @@ class Solar3(datasets.GeneratorBasedBuilder):
                     tok2position[_tok] = _pos
 
             if len(involved_tgt_sents) > 0:
-                tgt_sent_data = target_data[involved_tgt_sents[0]]
+                tgt_sent_data = deepcopy(target_data[involved_tgt_sents[0]])
+
                 for tgt_sent_id in involved_tgt_sents[1:]:
                     curr_sent_data = target_data[tgt_sent_id]
                     tgt_sent_data["id_token"].extend(curr_sent_data["id_token"])