我有一个pandas数据帧:数据.它有列["名称","A","B"]
我想做(和工作)的是:
d2 = data[data['name'] == 'fred'] #This gives me multiple rows
d2['A'] = 0
这会将fred行上的A列设置为0.我也做了:
indexes = d2.index
data['A'][indexes] = 0
但是,两人都给了我同样的警告:
/Users/brianp/work/cyan/venv/lib/python2.7/site-packages/pandas/core/indexing.py:128: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame
See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy
大熊猫是怎么想让我这样做的？