Streaming tabulator

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In [ ]:
import numpy as np
import pandas as pd
import panel as pn

In [ ]:
df = pd.DataFrame(np.random.randn(10, 4), columns=list('ABCD')).cumsum()

rollover = pn.widgets.IntInput(name='Rollover', value=15)
follow = pn.widgets.Checkbox(name='Follow', value=True, align='end')

tabulator = pn.widgets.Tabulator(df, height=450)

def color_negative_red(val):
    Takes a scalar and returns a string with
    the css property `'color: red'` for negative
    strings, black otherwise.
    color = 'red' if val < 0 else 'green'
    return 'color: %s' % color

def stream():
    data = df.iloc[-1] + np.random.randn(4), rollover=rollover.value, follow=follow.value)

cb = pn.state.add_periodic_callback(stream, 200)

    pn.Row(cb.param.period, rollover, follow, width=400),
This web page was generated from a Jupyter notebook and not all interactivity will work on this website. Right click to download and run locally for full Python-backed interactivity.

Download this notebook from GitHub (right-click to download).