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 101, 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: 'pre' The above exception was the direct cause of the following exception: Traceback (most recent call last): File "C:/Users/DELL/Desktop/python_flask-dc/python_flask/bpnn_tf.py", line 108, in <module> cf['pre'] = cf['pre'].astype(str) File "E:\python-3.7.0\lib\site-packages\pandas\core\frame.py", line 2906, in __getitem__ indexer = self.columns.get_loc(key) File "E:\python-3.7.0\lib\site-packages\pandas\core\indexes\base.py", line 2900, in get_loc raise KeyError(key) from err KeyError: 'pre'
时间: 2023-10-06 16:06:44 浏览: 525
这个错误的意思是在Pandas DataFrame中找不到名为"pre"的列。请检查输入的DataFrame是否包含名为"pre"的列。您可以使用 `print(df.columns)` 打印DataFrame的所有列名以检查是否存在名为"pre"的列。另外,请确保输入的列名正确无误,并且没有引入任何拼写错误。
相关问题
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 98, in pandas._libs.index.IndexEngine.get_loc File "pandas\_libs\index_class_helper.pxi", line 93, in pandas._libs.index.Int64Engine._check_type KeyError: '2'
这个错误通常是因为你在尝试使用一个不存在的键(key)来访问 Pandas 数据框(DataFrame)的行。请检查你的代码中是否有类似于`df['2']`这样的语句,确认这个键是否真的存在于数据框中。如果没有,请检查数据框的列名和索引,以确保你使用正确的键。如果问题仍然存在,请提供更多的代码和数据信息以便我更好地帮助你解决问题。
ERROR in app: Exception on /analyse2 [POST] Traceback (most recent call last): File "E:\python-3.7.0\lib\site-packages\pandas\core\indexes\base.py", line 2898, 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 98, in pandas._libs.index.IndexEngine.get_loc File "pandas\_libs\index_class_helper.pxi", line 93, in pandas._libs.index.Int64Engine._check_type KeyError: 'value' The above exception was the direct cause of the following exception:
这个错误信息看起来是在使用 Pandas 库时出现了问题。根据错误信息,可能是在调用 Pandas 的 get_loc() 方法时传入了一个不存在的键值('value'),导致了 KeyError 异常。你可以检查一下代码中是否正确传入了键值,或者查看是否有其他地方引起了这个异常。如果需要更多帮助,请提供更多的上下文信息。
阅读全文