已解决（pandas读取DataFrame列报错）raise KeyError(key) from err KeyError: (‘name‘, ‘age‘)

已解决（pandas读取DataFrame列报错）raise KeyError(key) from err KeyError: (‘name‘, ‘age‘)

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报错代码

粉丝群里的一个小伙伴想输出name和age两列的数据；

import pandas as pd
import numpy as np

df = pd.DataFrame(data={
    
    
    "name": ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J"],
    "age": [23, 26, 37, 46, 85, 12, 53, 80, 66, 32],
    "score": [13, 23, 22, 76, 56, 89, 99, 100, 10, 54],
})

print(df['name', 'age'])

报错截图：

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "E:/Python/test3.py", line 10, in <module>
    print(df['name','age'])
  File "D:\Python3.8\lib\site-packages\pandas\core\frame.py", line 3505, in __getitem__
    indexer = self.columns.get_loc(key)
  File "D:\Python3.8\lib\site-packages\pandas\core\indexes\base.py", line 3623, in get_loc
    raise KeyError(key) from err
KeyError: ('name', 'age')

报错翻译

报错信息翻译：

将KeyError（键）从err中提升
值错误：(‘name‘, ‘age‘)

报错原因

报错原因：pandas读取多列是需要两个中括号包着

解决方法

修改代码为：

import pandas as pd
import numpy as np

df = pd.DataFrame(data={
    
    
    "name": ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J"],
    "age": [23, 26, 37, 46, 85, 12, 53, 80, 66, 32],
    "score": [13, 23, 22, 76, 56, 89, 99, 100, 10, 54],
})

print(df[['name', 'age']])

再次运行成功：