Overview

Panel 1.0, released on May 10, 2023, is the first stable release of the interactive dashboard framework. It introduces the chat system and reactive expressions.

Main Features

Chat system

Panel 1.0 includes ready-to-use chat components for building conversational interfaces integrated into dashboards.

python 
import panel as pn

pn.extension()

def respond(content, user, instance):
    return f'You said: {content}'

chat = pn.chat.ChatInterface(
    callback=respond,
    placeholder='Type a message...',
)
chat.servable()

Reactive expressions

Reactive expressions (pn.rx) enable creating dynamic interfaces without explicit callbacks, using a declarative model.

python 
import panel as pn

pn.extension()

slider = pn.widgets.IntSlider(name='Value', value=5,
                              start=0, end=100)

# Reactive expression
result = pn.rx(slider) * 2

pn.Column(
    slider,
    pn.pane.Str(pn.rx('Double: {}').format(result)),
).servable()

Sources