我有一个检查Excel工作表的代码，如果发现一些更改，则对整个工作表进行快照（Pandas Dataframe）并将其保存到带有时间戳的csv中。 它已经整天运行了，可以正常工作，但是通常一天一次或两次，我收到以下错误消息：
Fatal Python error: deallocating None
Current thread 0x000013d4 (most recent call first):
File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\algorithms.py", line 1655 in take_nd
File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\internals\blocks.py", line 1238 in take_nd
File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\internals\managers.py", line 1235 in <listcomp>
File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\internals\managers.py", line 1235 in reindex_indexer
File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\internals\managers.py", line 1350 in take
File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\generic.py", line 3359 in _take
File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\frame.py", line 2969 in _getitem_bool_array
File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\frame.py", line 2918 in __getitem__
File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\frame.py", line 4637 in drop_duplicates
File "C:\Python projects\RTD_recorder_1thrd_Pandas.py", line 79 in <module>
这是导致冻结的代码：
final_result = pd.concat([final_result, difference]).drop_duplicates(keep="first", subset=indexes)
有人知道这里可能出什么问题吗？ 如果有帮助，请参见以下完整代码：https://www.codepile.net/pile/BRx6W2e0