runtime error

0%| | 0/1 [00:00<?, ?it/s] 20240506: 0%| | 0/1 [00:00<?, ?it/s] 20240506: 100%|██████████| 1/1 [00:01<00:00, 1.25s/it] 20240506: 100%|██████████| 1/1 [00:01<00:00, 1.25s/it] Traceback (most recent call last): File "/home/user/.local/lib/python3.8/site-packages/pandas/core/indexes/base.py", line 3802, in get_loc return self._engine.get_loc(casted_key) File "pandas/_libs/index.pyx", line 138, in pandas._libs.index.IndexEngine.get_loc File "pandas/_libs/index.pyx", line 165, in pandas._libs.index.IndexEngine.get_loc File "pandas/_libs/hashtable_class_helper.pxi", line 5745, in pandas._libs.hashtable.PyObjectHashTable.get_item File "pandas/_libs/hashtable_class_helper.pxi", line 5753, in pandas._libs.hashtable.PyObjectHashTable.get_item KeyError: 0 The above exception was the direct cause of the following exception: Traceback (most recent call last): File "app.py", line 228, in <module> df['month'] = df['date'].str.split(pat='.', expand=True)[0] File "/home/user/.local/lib/python3.8/site-packages/pandas/core/frame.py", line 3807, in __getitem__ indexer = self.columns.get_loc(key) File "/home/user/.local/lib/python3.8/site-packages/pandas/core/indexes/base.py", line 3804, in get_loc raise KeyError(key) from err KeyError: 0

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