【发布时间】：2021-10-23 11:19:45
【问题描述】：
当“RIDAGEYR”> 60 时，我想从“BPXSY1”的前 100 行的另一个 DataFrame df 中找到创建一个测试 DataFrame df1。
我尝试以下（Python 3.8.8）：
df1 = df[df.RIDAGEYR > 60].loc[range(0, 100)]
但是拿回这个：
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/wel51x/opt/anaconda3/lib/python3.8/site-packages/pandas/core/indexing.py", line 895, in __getitem__
return self._getitem_axis(maybe_callable, axis=axis)
File "/Users/wel51x/opt/anaconda3/lib/python3.8/site-packages/pandas/core/indexing.py", line 1113, in _getitem_axis
return self._getitem_iterable(key, axis=axis)
File "/Users/wel51x/opt/anaconda3/lib/python3.8/site-packages/pandas/core/indexing.py", line 1053, in _getitem_iterable
keyarr, indexer = self._get_listlike_indexer(key, axis, raise_missing=False)
File "/Users/wel51x/opt/anaconda3/lib/python3.8/site-packages/pandas/core/indexing.py", line 1266, in _get_listlike_indexer
self._validate_read_indexer(keyarr, indexer, axis, raise_missing=raise_missing)
File "/Users/wel51x/opt/anaconda3/lib/python3.8/site-packages/pandas/core/indexing.py", line 1321, in _validate_read_indexer
raise KeyError(
KeyError: "Passing list-likes to .loc or [] with any missing labels is no longer supported. The following labels were missing: Int64Index([ 0, 2, 4, 5, 7,\n ...\n 95, 96, 97, 98, 99],\n dtype='int64', length=72). See https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#deprecate-loc-reindex-listlike"
通过阅读其他人所写的内容，我意识到当他们遇到类似问题需要重新索引时；然而，许多不同的修复尝试都会产生相同的结果。
非常感谢任何帮助。
【问题讨论】：
-
是的，我试过了，但到目前为止还没有为我解决。
-
df1 = df[df.RIDAGEYR > 60].head(100)可能是解决此问题的更常见方法。 -
@Henry Ecker - 谢谢
标签： python pandas slice keyerror