[英]Drop specific multiIndex columns in a pandas dataframe
Suppose one has a dataframe created as such: 假设一个具有这样创建的数据框:
tdata = {('A', 50): [1, 2, 3, 4],
('A', 55): [5, 6, 7, 8],
('B', 10): [10, 20, 30, 40],
('B', 20): [50, 60, 70, 80],
('B', 50): [2, 4, 6, 8],
('B', 55): [10, 12, 14, 16]}
tdf = pd.DataFrame(tdata, index=range(0,4))
A B
50 55 10 20 50 55
0 1 5 10 50 2 10
1 2 6 20 60 4 12
2 3 7 30 70 6 14
3 4 8 40 80 8 16
tdf.drop(['B', [10,20]])
? tdf.drop(['B', [10,20]])
删除列? Note, I know that my example of the command is by no means close to what it should be, but I hope that it gets the gist across. You can use drop
by list
of tuples
: 您可以使用
drop
通过list
的tuples
:
print (tdf.drop([('B',10), ('B',20)], axis=1))
A B
50 55 50 55
0 1 5 2 10
1 2 6 4 12
2 3 7 6 14
3 4 8 8 16
For remove columns by level
: 对于按
level
删除列:
mask = tdf.columns.get_level_values(1) >= 50
print (mask)
[ True True False False True True]
print (tdf.loc[:, mask])
A B
50 55 50 55
0 1 5 2 10
1 2 6 4 12
2 3 7 6 14
3 4 8 8 16
If need remove by level is possible specify only one level: 如果需要按级别删除,则仅指定一个级别:
print (tdf.drop([50,55], axis=1, level=1))
B
10 20
0 10 50
1 20 60
2 30 70
3 40 80
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