KeyError Traceback (most recent call last) D:\anaconda3\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance) 2894 try: -> 2895 return self._engine.get_loc(casted_key) 2896 except KeyError as err: pandas\_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc() pandas\_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc() pandas\_libs\hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item() pandas\_libs\hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item() KeyError: '累计参会时长' The above exception was the direct cause of the following exception: KeyError Traceback (most recent call last) <ipython-input-120-194e4b87e045> in <module> 12 13 # 将时间列中的所有时间字符串转换为分钟数 ---> 14 df3['累计参会时长'] = df3['累计参会时长'].apply(convert_to_minutes) 15 16 # 输出转换后的DataFrame D:\anaconda3\lib\site-packages\pandas\core\frame.py in __getitem__(self, key) 2900 if self.columns.nlevels > 1: 2901 return self._getitem_multilevel(key) -> 2902 indexer = self.columns.get_loc(key) 2903 if is_integer(indexer): 2904 indexer = [indexer] D:\anaconda3\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance) 2895 return self._engine.get_loc(casted_key) 2896 except KeyError as err: -> 2897 raise KeyError(key) from err 2898 2899 if tolerance is not None: KeyError: '累计参会时长' 以上代码有此报错 应该怎么改
时间: 2024-02-14 20:08:18 浏览: 202
根据报错信息,您的DataFrame中没有名为'累计参会时长'的列,因此在尝试访问该列时出现了KeyError。您需要检查一下DataFrame中的列名,确保使用的是正确的列名。
如果您确定列名是正确的,那么可能是因为列名中包含了空格或其他特殊字符,导致无法正确访问该列。您可以尝试使用以下方式访问该列:
```python
df3['累计参会时长'] = df3.loc[:, '累计参会时长'].apply(convert_to_minutes)
```
这样可以通过.loc方法来访问该列,并将转换后的结果赋值给列'累计参会时长'。
相关问题
Traceback (most recent call last): File "F:\pythonproject\随机森林\1.py", line 16, in <module> X = data.loc[:, 'DATE'] File "E:\anaconda\lib\site-packages\pandas\core\indexing.py", line 961, in __getitem__ return self._getitem_tuple(key) File "E:\anaconda\lib\site-packages\pandas\core\indexing.py", line 1140, in _getitem_tuple return self._getitem_lowerdim(tup) File "E:\anaconda\lib\site-packages\pandas\core\indexing.py", line 867, in _getitem_lowerdim section = self._getitem_axis(key, axis=i) File "E:\anaconda\lib\site-packages\pandas\core\indexing.py", line 1202, in _getitem_axis return self._get_label(key, axis=axis) File "E:\anaconda\lib\site-packages\pandas\core\indexing.py", line 1153, in _get_label return self.obj.xs(label, axis=axis) File "E:\anaconda\lib\site-packages\pandas\core\generic.py", line 3849, in xs return self[key] File "E:\anaconda\lib\site-packages\pandas\core\frame.py", line 3505, in __getitem__ indexer = self.columns.get_loc(key) File "E:\anaconda\lib\site-packages\pandas\core\indexes\base.py", line 3623, in get_loc raise KeyError(key) from err KeyError: 'DATE'
这个错误是由于你尝试在 DataFrame 中选择一个不存在的列名 'DATE',导致 Pandas 找不到该列名并引发 KeyError。你需要检查 DataFrame 中是否存在名为 'DATE' 的列,或者确认你输入的列名是否正确。你可以使用 DataFrame 的列名列表属性来查看所有可用的列名。例如,使用 `print(df.columns.tolist())` 来打印 DataFrame 中所有的列名。如果你的 DataFrame 中确实没有名为 'DATE' 的列,则需要重新检查你的数据,确认你正在选择正确的列。
Traceback (most recent call last): File "D:\Anaconda\lib\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: 'A' The above exception was the direct cause of the following exception: Traceback (most recent call last): File "e:\Mydata\py\提取指定范围excel数据.py", line 7, in <module> data = df.loc[0:9, 'A':'B'] # 例如提取第1行到第10行,第1列到第3列的数据 File "D:\Anaconda\lib\site-packages\pandas\core\indexing.py", line 1067, in __getitem__ return self._getitem_tuple(key) File "D:\Anaconda\lib\site-packages\pandas\core\indexing.py", line 1256, in _getitem_tuple return self._getitem_tuple_same_dim(tup) File "D:\Anaconda\lib\site-packages\pandas\core\indexing.py", line 924, in _getitem_tuple_same_dim retval = getattr(retval, self.name)._getitem_axis(key, axis=i) File "D:\Anaconda\lib\site-packages\pandas\core\indexing.py", line 1290, in _getitem_axis return self._get_slice_axis(key, axis=axis) File "D:\Anaconda\lib\site-packages\pandas\core\indexing.py", line 1324, in _get_slice_axis indexer = labels.slice_indexer(slice_obj.start, slice_obj.stop, slice_obj.step) File "D:\Anaconda\lib\site-packages\pandas\core\indexes\base.py", line 6559, in slice_indexer start_slice, end_slice = self.slice_locs(start, end, step=step) File "D:\Anaconda\lib\site-packages\pandas\core\indexes\base.py", line 6767, in slice_locs start_slice = self.get_slice_bound(start, "left") File "D:\Anaconda\lib\site-packages\pandas\core\indexes\base.py", line 6686, in get_slice_bound raise err File "D:\Anaconda\lib\site-packages\pandas\core\indexes\base.py", line 6680, in get_slice_bound slc = self.get_loc(label) File "D:\Anaconda\lib\site-packages\pandas\core\indexes\base.py", line 3804, in get_loc raise KeyError(key) from err KeyError: 'A'
这个错误是由于在指定的 Excel 文件中没有找到名为 `'A'` 和 `'B'` 的列引起的。请确保你的 Excel 文件中存在指定的列名,或者根据你的实际情况修改代码中的列名称。
你可以通过以下方法查看 Excel 文件中的列名:
```python
import pandas as pd
# 读取 Excel 文件
df = pd.read_excel('input.xlsx', sheet_name='Sheet1')
# 输出列名
print(df.columns)
```
运行上述代码后,你会看到输出的列名列表。请确认你要提取的列名在列表中存在,并在代码中使用正确的列名。
如果你还有其他问题,请随时提问。
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