df.interactive() fails on a pandas DataFrame that has 'interface' in df.columns

ALL software version info

• holoviz_tutorial (see: https://pyviz-dev.github.io/holoviz/tutorial/Setup.html) on Windows 10

Description of expected behavior and the observed behavior

Expected: executing interactive() on a pandas.DataFrame should return an interactive pandas DataFrame that I can use with widgets. This should be true for any column name specified in the DataFrame.

Observed: interactive() fails on a pandas.DataFrame object that includes a column named interface.

Complete, minimal, self-contained example code that reproduces the issue

import hvplot.pandas
pd.DataFrame([1,2,3], columns=['interface']).interactive()

Stack traceback and/or browser JavaScript console output

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-11-dff52aeb506d> in <module>
      1 import hvplot.pandas
----> 2 pd.DataFrame([1,2,3], columns=['interface']).interactive()

~\Projects\holoviz_tutorial\envs\default\lib\site-packages\hvplot\pandas.py in <lambda>(self)
     17     setattr(pd.Series, name, plot_prop)
     18 
---> 19     _patch_interactive = lambda self: Interactive(self)
     20     _patch_interactive.__doc__ = Interactive.__call__.__doc__
     21     interactive_prop = property(_patch_interactive)

~\Projects\holoviz_tutorial\envs\default\lib\site-packages\hvplot\interactive.py in __init__(self, obj, transform, plot, depth, loc, center, dmap, inherit_kwargs, max_rows, **kwargs)
     83         self._max_rows = max_rows
     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

~\Projects\holoviz_tutorial\envs\default\lib\site-packages\holoviews\core\data\__init__.py in __init__(self, data, kdims, vdims, **kwargs)
    339 
    340         validate_vdims = kwargs.pop('_validate_vdims', True)
--> 341         initialized = Interface.initialize(type(self), data, kdims, vdims,
    342                                            datatype=kwargs.get('datatype'))
    343         (data, self.interface, dims, extra_kws) = initialized

~\Projects\holoviz_tutorial\envs\default\lib\site-packages\holoviews\core\data\interface.py in initialize(cls, eltype, data, kdims, vdims, datatype)
    206 
    207         # Process Element data
--> 208         if (hasattr(data, 'interface') and issubclass(data.interface, Interface)):
    209             if datatype is None:
    210                 datatype = [dt for dt in data.datatype if dt in eltype.datatype]

TypeError: issubclass() arg 1 must be a class

Screenshots or screencasts of the bug in action

[jbednar]

Great! Please open a PR with those changes: https://docs.github.com/en/github/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request

[geronimos]

I implemented a fix in holoviews/core/data/interface and also added a test that succeeds only after the fix. However, I do not have access rights to push the created fix-core-data-interface branch to holoviews. How can I push the fix to origin?