holoviews can't find flexx when using a Dimens

Question

I am attempting to learn HoloViews within my ipython notebook and have run into an issue related to using a custom value_format for my kdims Dimension object. Right now, my xformat routine is basically a no-op but I want to experiment with transposing the default tick labels to reduce the number of ticks on my x-axis, however, I need to get it to work as is before I move on to that.

Here is my code:

%%output size=200
%%opts Curve [width=600 height=250] {+framewise}
%%opts Curve.Load.Ticket (color='red')

def xformat(x):
    return x

kdims=hv.Dimension('Day Section', label='Week Day and Hour', value_format=xformat)

tload = hv.Curve(simple_pd,vdims=[('Max Ticket Load', 'Maxiumum Ticket Load')],kdims=kdims,group='Load',label='Ticket')
tload

The tload element renders, however, I get a warning that says:

WARNING:root:main: Day Section dimension formatter could not be converted to tick formatter. Ensure Flexx is installed ("conda install -c bokeh flexx" or "pip install flexx")

I verified that flexx is installed in my environment:

!conda list flexx
!conda list holoviews

# packages in environment at /opt/conda/envs/DSX-Python35:
#
flexx                     0.5.0                      py_0    conda-forge
# packages in environment at /opt/conda/envs/DSX-Python35:
#
holoviews                 1.10.7                     py_0    pyviz

Fairly confused by this warning. Hopefully someone can shed some light on what might be wrong in my environment.

Answer 1

I think it's a compatibility issue with the most recent flexx release, for now I'd recommend downgrading to flexx 0.4.1 with:

conda install -c conda-forge flexx=0.4.1