pn.widgets not working in a list

Hi, I’m trying out the hvplot .interactive. I got TypeError: ‘RadioButtonGroup’ object is not callable for the following code, I think it’s because I can’t write my xaxis in a list. It works if I change .groupby(['origin', xaxis]) to .groupby(xaxis), but it’d be nice if pn.widgets can work in a list. I’d really appreciate some help. Thanks!

from bokeh.sampledata.autompg import autompg_clean as df
import hvplot.pandas
import panel as pn
import holoviews as hv
hv.extension('bokeh')
idf = df.interactive()
cylinders = pn.widgets.IntSlider(start=4, end=8, step=2)
mfr = pn.widgets.ToggleGroup(options=['ford', 'chevrolet', 'plymouth', 'honda', 'sbaru', 'volkswagen'], 
                             value=['ford', 'chevrolet', 'plymouth', 'honda', 'sbaru', 'volkswagen'])
xaxis = pn.widgets.RadioButtonGroup(name='X axis', options=['mpg', 'yr'])
yaxis = pn.widgets.RadioButtonGroup(name='Y axis', options=['hp', 'weight'])

ipipeline = (
    idf[
        (idf.cyl == cylinders) & 
        (idf.mfr.isin(mfr))
    ]
    .groupby(['origin', xaxis])[yaxis].mean()
    .to_frame()
    .reset_index()
)

Traceback

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/var/folders/n9/dr352bs550nck1fg2mz9vpn80000gn/T/ipykernel_46537/1739249479.py in <module>
     12 
     13 ipipeline = (
---> 14     idf[
     15         (idf.cyl == cylinders) &
     16         (idf.mfr.isin(mfr))

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/hvplot/interactive.py in __call__(self, *args, **kwargs)
    185                                        accessor=True)
    186             kwargs = dict(self._inherit_kwargs, **kwargs)
--> 187             clone = self._clone(method(*args, **kwargs), plot=self._method == 'plot')
    188         finally:
    189             self._method = None

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/hvplot/interactive.py in _clone(self, transform, plot, loc, center, dmap, **kwargs)
    114         depth = self._depth+1
    115         kwargs = dict(self._inherit_kwargs, **dict(self._kwargs, **kwargs))
--> 116         return type(self)(self._obj, transform, plot, depth,
    117                           loc, center, dmap, **kwargs)
    118 

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/hvplot/interactive.py in __init__(self, obj, transform, plot, depth, loc, center, dmap, inherit_kwargs, max_rows, **kwargs)
     84         self._kwargs = kwargs
     85         ds = hv.Dataset(self._obj)
---> 86         self._current = self._transform.apply(ds, keep_index=True, compute=False)
     87         self._init = True
     88 

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/holoviews/util/transform.py in apply(self, dataset, flat, expanded, ranges, all_values, keep_index, compute, strict)
    736             drange = ranges.get(eldim, {})
    737             drange = drange.get('combined', drange)
--> 738             data = self._apply_fn(dataset, data, fn, fn_name, args,
    739                                   kwargs, accessor, drange)
    740         drop_index = keep_index_for_compute and not keep_index

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/holoviews/util/transform.py in _apply_fn(self, dataset, data, fn, fn_name, args, kwargs, accessor, drange)
    634                         data = method(*args, **kwargs)
    635                     else:
--> 636                         raise e
    637         else:
    638             data = fn(*args, **kwargs)

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/holoviews/util/transform.py in _apply_fn(self, dataset, data, fn, fn_name, args, kwargs, accessor, drange)
    628             else:
    629                 try:
--> 630                     data = method(*args, **kwargs)
    631                 except Exception as e:
    632                     if 'axis' in kwargs:

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/pandas/core/frame.py in groupby(self, by, axis, level, as_index, sort, group_keys, squeeze, observed, dropna)
   7624         # error: Argument "squeeze" to "DataFrameGroupBy" has incompatible type
   7625         # "Union[bool, NoDefault]"; expected "bool"
-> 7626         return DataFrameGroupBy(
   7627             obj=self,
   7628             keys=by,

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/pandas/core/groupby/groupby.py in __init__(self, obj, keys, axis, level, grouper, exclusions, selection, as_index, sort, group_keys, squeeze, observed, mutated, dropna)
    886             from pandas.core.groupby.grouper import get_grouper
    887 
--> 888             grouper, exclusions, obj = get_grouper(
    889                 obj,
    890                 keys,

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/pandas/core/groupby/grouper.py in get_grouper(obj, key, axis, level, sort, observed, mutated, validate, dropna)
    875         # allow us to passing the actual Grouping as the gpr
    876         ping = (
--> 877             Grouping(
    878                 group_axis,
    879                 gpr,

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/pandas/core/groupby/grouper.py in __init__(self, index, grouper, obj, level, sort, observed, in_axis, dropna)
    533                 raise ValueError(f"Grouper for '{t}' not 1-dimensional")
    534 
--> 535             self.grouping_vector = index.map(self.grouping_vector)
    536 
    537             if not (

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/pandas/core/indexes/base.py in map(self, mapper, na_action)
   5505         from pandas.core.indexes.multi import MultiIndex
   5506 
-> 5507         new_values = self._map_values(mapper, na_action=na_action)
   5508 
   5509         attributes = self._get_attributes_dict()

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/pandas/core/base.py in _map_values(self, mapper, na_action)
    868 
    869         # mapper is a function
--> 870         new_values = map_f(values, mapper)
    871 
    872         return new_values

/opt/anaconda3/envs/p39/lib/python3.9/site-packages/pandas/_libs/lib.pyx in pandas._libs.lib.map_infer()

TypeError: 'RadioButtonGroup' object is not callable

[Hoxbro]

No problem, glad I could help - so you’re able to share with the world how awesome the holoviz stack is.

[Hoxbro]

The reason why is the plot is not updating when I change the cylinder slider is that both it and the mfr toggle group have no name. This means that if I change the order of them in the ipipeline it is the toggle group which becomes unresponsive. If I give one of the widget a name both of them will work. This should be fixed upstream in holoviews to avoid it overwriting widgets with no (or the same name).