Datatable docs
ltype
stypes
from datatable import dt, f
df = dt.Frame({'a': [1, 2, 1, 2, 1, 2],
'b': [True, False, True, False, True, False],
'c': [1.0, 2.0, 1.0, 2.0, 1.0, 2.0]})
df
| a b c
| int32 bool8 float64
-- + ----- ----- -------
0 | 1 1 1
1 | 2 0 2
2 | 1 1 1
3 | 2 0 2
4 | 1 1 1
5 | 2 0 2
[6 rows x 3 columns]
- Select the
boolean column :
df[:, f[bool]]
| b
| bool8
-- + -----
0 | 1
1 | 0
2 | 1
3 | 0
4 | 1
5 | 0
[6 rows x 1 column]
- Select the
float64 column :
df[:, f[dt.float64]]
| c
| float64
-- + -------
0 | 1
1 | 2
2 | 1
3 | 2
4 | 1
5 | 2
[6 rows x 1 column]
- Exclude the
int32 column :
df[:, [dtype.name != "int32" for dtype in df.stypes]]
| b c
| bool8 float64
-- + ----- -------
0 | 1 1
1 | 0 2
2 | 1 1
3 | 0 2
4 | 1 1
5 | 0 2
[6 rows x 2 columns]
