try 在单个 df[ _ , _ ] 表单中打印时出现 python pandas 数据框错误

try 在单个df[_，_]表单中打印数据帧时，我看到数据帧错误.以下是代码行

#Data Frames code
import numpy as np
import pandas as pd

randArr = np.random.randint(0,100,20).reshape(5,4)
df =pd.DataFrame(randArr,np.arange(101,106,1),['PDS','算法','SE','INS'])
print(df['PDS','SE'])

错误:

Traceback (most recent call last): File "C:\Users\subro\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pandas\core\indexes\base.py", line 3621, in get_loc return self._engine.get_loc(casted_key) File "pandas\_libs\index.pyx", line 136, in pandas._libs.index.IndexEngine.get_loc File "pandas\_libs\index.pyx", line 163, in pandas._libs.index.IndexEngine.get_loc File "pandas\_libs\hashtable_class_helper.pxi", line 5198, in pandas._libs.hashtable.PyObjectHashTable.get_item File "pandas\_libs\hashtable_class_helper.pxi", line 5206, in pandas._libs.hashtable.PyObjectHashTable.get_item KeyError: ('PDS', 'SE')个

上述异常是以下异常的直接原因:

Traceback (most recent call last): File "D:\Education\4th year\1st sem\Machine Learning Lab\1st Lab\python\pandas\pdDataFrame.py", line 11, in <module> print(df['PDS','SE']) File "C:\Users\subro\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pandas\core\frame.py", line 3505, in __getitem__ indexer = self.columns.get_loc(key) File "C:\Users\subro\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pandas\core\indexes\base.py", line 3623, in get_loc raise KeyError(key) from err KeyError: ('PDS', 'SE')个