后settingwithcopywarning的错误,我得到这个错误:获取即使使用的.loc
C:\Users\rt\Anaconda3\lib\site-packages\pandas\core\indexing.py:337: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_indexer,col_indexer] = value instead
See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy
self.obj[key] = _infer_fill_value(value)
C:\Users\rt\Anaconda3\lib\site-packages\pandas\core\indexing.py:517: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_indexer,col_indexer] = value instead
See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy
self.obj[item] = s
不过,我已经使用的.loc已经所以不知道为什么这个错误是发生。代码大纲是这样的:
for name, group in results.groupby():
for idx, row in group.iterrows():
group.loc[idx, 'area'] = 10.0
我使用最新的大熊猫(0.20.3)和Python(3.6)
你可以添加结果df吗? – Dark