DeserializationError when editing Data Table

Current environment:

• Bokeh 0.12.14dev3 (although I think the same error occurs in 0.12.13)
• Python 3.6
• Windows 10
• Google Chrome

When editing or clicking on cells in a data table bokeh will display a DeserializationError:

This can be tested with the data_table.py example on the bokeh github. Open that server up and then click on a cell and the error should appear. Not sure where this is coming from, but I do believe it happened somewhere after 0.12.10 (which doesn’t produce the error).

[bryevdv]

FYI a potential workaround for now at least is to use python lists for a datatable source:

def update():
    current = df[(df['salary'] >= slider.value[0]) & (df['salary'] <= slider.value[1])].dropna()
    source.data = {
        'name'             : list(current.name),
        'salary'           : list(current.salary),
        'years_experience' : list(current.years_experience),
    }

[Karel-van-de-Plassche]

Just to let you know this is still there in `0.13.0dev11’. A minimal(er) example:

import numpy as np

from bokeh.models import ColumnDataSource
from bokeh.io import curdoc, output_notebook, push_notebook, show
from bokeh.models.widgets import DataTable, TableColumn, StringFormatter

data = dict(
X = np.linspace(0, 10), # Wrap with list() to remove the unhandled error
Y = np.linspace(10, 20) # Wrap with list() to remove the unhandled error
)
source = ColumnDataSource(data)

columns = [ 
TableColumn(field="X", title="X",formatter=StringFormatter(font_style="bold",text_color="midnightblue")),TableColumn(field="Y", title="Y",formatter=StringFormatter(font_style="bold",text_color="midnightblue")),
]

data_table = DataTable(source=source,
                       columns=columns,
                       fit_columns=True,
                       width=850, height=280,       
                       editable=True)

curdoc().add_root(data_table)