当尝试以 data["temp"] 方式访问 pandas 数据框中的单个或多个元素时，出现错误。这是有关如何加载数据的代码片段：

import pandas

data = pandas.read_csv("weather_data.csv")

y = data["temp"]
print(y)

csv 文件 -> ：

日期;温度;状况 周一;12;周二晴;14;周三有雨;15;周二有雨;14;周五多云;21;周六晴;22;周日晴;24;晴

这是我收到的错误：

line 3790, in get_loc
    return self._engine.get_loc(casted_key)
  File "index.pyx", line 152, in pandas._libs.index.IndexEngine.get_loc
  File "index.pyx", line 181, in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\hashtable_class_helper.pxi", line 7080, in pandas._libs.hashtable.PyObjectHashTable.get_item
  File "pandas\_libs\hashtable_class_helper.pxi", line 7088, in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 'temp'

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

Traceback (most recent call last):
  File "C:NAME", line 5, in <module>
    y = data["temp"]
  File "C:\Users\sehab\PycharmProjects\pythonProject\venv\lib\site-packages\pandas\core\frame.py", line 3893, in __getitem__
    indexer = self.columns.get_loc(key)
  File "C:\Users\sehab\PycharmProjects\pythonProject\venv\lib\site-packages\pandas\core\indexes\base.py", line 3797, in get_loc
    raise KeyError(key) from err
KeyError: 'temp'

是我的代码有问题还是 pandas 包有问题？

解决方案

您没有正确解析 csv，因为默认分隔符是，","但您有";"。

请尝试以下操作：

data = pandas.read_csv(
    filepath_or_buffer="weather_data.csv",
    sep=";",
    header=0
)