Streaming tabulator¶
Download this notebook from GitHub (right-click to download).
In [ ]:
import numpy as np
import pandas as pd
import panel as pn
pn.extension()
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
tabulator.style.applymap(color_negative_red)
def stream():
data = df.iloc[-1] + np.random.randn(4)
tabulator.stream(data, rollover=rollover.value, follow=follow.value)
cb = pn.state.add_periodic_callback(stream, 200)
pn.Column(
pn.Row(cb.param.period, rollover, follow, width=400),
tabulator,
).servable()
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).