Python3 Pandas.DataFrame.info错误密钥：30

问题描述

所以我当时正在研究一些数据集，然后尝试使用熊猫进行分析，结果偶然发现了以下错误..，我的大脑呆滞了：（

这是引发异常的代码段

import pandas as pd
from sklearn.datasets import load_breast_cancer


X,y = load_breast_cancer(return_X_y=True)
data = pd.DataFrame(X)
data['class'] = y
data.head()
data.tail()
data.columns
print('length of data is',len(data))
data.shape
data.info()

这是错误引用

C:\Users\97150\PycharmProjects\EmbeddedLinux\venv\Scripts\python.exe C:/Users/97150/PycharmProjects/EmbeddedLinux/AI/project.py
length of data is 569
Traceback (most recent call last):
  File "C:\Users\97150\PycharmProjects\EmbeddedLinux\venv\lib\site-packages\pandas\core\indexes\base.py",line 2889,in get_loc
    return self._engine.get_loc(casted_key)
  File "pandas\_libs\index.pyx",line 70,in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\index.pyx",line 97,in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\hashtable_class_helper.pxi",line 1675,in pandas._libs.hashtable.PyObjectHashTable.get_item
  File "pandas\_libs\hashtable_class_helper.pxi",line 1683,in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 30

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

Traceback (most recent call last):
  File "C:/Users/97150/PycharmProjects/EmbeddedLinux/AI/project.py",line 42,in <module>
    data.info()
  File "C:\Users\97150\PycharmProjects\EmbeddedLinux\venv\lib\site-packages\pandas\core\frame.py",line 2587,in info
    self,verbose,buf,max_cols,memory_usage,null_counts
  File "C:\Users\97150\PycharmProjects\EmbeddedLinux\venv\lib\site-packages\pandas\io\formats\info.py",line 250,in info
    self._verbose_repr(lines,ids,dtypes,show_counts)
  File "C:\Users\97150\PycharmProjects\EmbeddedLinux\venv\lib\site-packages\pandas\io\formats\info.py",line 335,in _verbose_repr
    dtype = dtypes[i]
  File "C:\Users\97150\PycharmProjects\EmbeddedLinux\venv\lib\site-packages\pandas\core\series.py",line 882,in __getitem__
    return self._get_value(key)
  File "C:\Users\97150\PycharmProjects\EmbeddedLinux\venv\lib\site-packages\pandas\core\series.py",line 991,in _get_value
    loc = self.index.get_loc(label)
  File "C:\Users\97150\PycharmProjects\EmbeddedLinux\venv\lib\site-packages\pandas\core\indexes\base.py",line 2891,in get_loc
    raise KeyError(key) from err
KeyError: 30

Process finished with exit code 1

注意：我正在使用PyCharm社区2020.2，并检查了更新等内容，

解决方法

所以，事实证明，熊猫表现得很奇怪。 从()中删除data.info()可以解决问题：）

,

您也可以尝试将verbose=True和null_counts=True参数传递给.info()方法以显示结果（如果不想考虑空值，可以使用冗长的参数）

data.info(verbose=True,null_counts=True)

让我知道事情是否对您有用。