head doesn't work on grouped data frame

[tmastny]

from siuba import *
from siuba.data import mtcars

import pandas as pd

mtcars >>\
    group_by(_.cyl) >>\
    head()
#> <siuba.dply.verbs.Pipeable at 0x11aedd6a0>
    
mtcars.groupby("cyl").head(1)
#>  mpg  cyl   disp   hp  drat    wt   qsec  vs  am  gear  carb
0  21.0    6  160.0  110  3.90  2.62  16.46   0   1     4     4
2  22.8    4  108.0   93  3.85  2.32  18.61   1   1     4     1
4  18.7    8  360.0  175  3.15  3.44  17.02   0   0     3     2

^{Created on 2020-08-06 by the reprexpy package}

siuba/siuba/dply/verbs.py

Lines 1119 to 1121 in 1d0a376

	@singledispatch2(pd.DataFrame)
	def head(__data, n = 5):
	return __data.head(n)

[machow]

resolved in v0.4.0