使用jupyter笔记本我将一个excel文件作为pandas数据框导入,命名为“clean”。当尝试按行名称选择数据时,clean.loc('Method Blank')会抛出一个错误,指出'Method Blank'不在索引中。我相信它可能与具有空值的数据库的索引有关,其中存在后续数据。有什么建议吗?
clean.shape
(8, 2)
type(clean)
pandas.core.frame.DataFrame
clean
Phenol Batch QC Check Unnamed: 1
NaN NaN PNL Results Acceptance
QC Parameter (ug/L) Criteria
Method Blank 1.1284 <2 ug/l
Reporting Limit (RL) Verification Standard (2.0 ug/L) 2.5318 ±40%
Reporting Limit (RL) Verification Standard (4.0 ug/L) 4.0967 ±40%
Laboratory Control Sample (LCS) 20.2061 ±20%
Quality Control Sample (QCS) 19.9668 ±20%
Calibration Verification (20.0 ug/L) 20.1203 ±20%
clean.loc['Method Blank']
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
~/anaconda3/lib/python3.6/site-packages/pandas/core/indexing.py in _has_valid_type(self, key, axis)
1505 if not ax.contains(key):
-> 1506 error()
1507 except TypeError as e:
答案 0 :(得分:0)
我不知道这是一个多索引的数据帧。
使用clean.ustack(level = 0).loc ['Method Blank']我能够让它返回相应的数据。