Show Sidebar Hide Sidebar

Click Events in Python

Click Events With FigureWidget

New to Plotly?

Plotly's Python library is free and open source! Get started by downloading the client and reading the primer.
You can set up Plotly to work in online or offline mode, or in jupyter notebooks.
We also have a quick-reference cheatsheet (new!) to help you get started!

Update Points Using a Click Callback

In [ ]:
import plotly.graph_objs as go

import numpy as np

x = np.random.rand(100)
y = np.random.rand(100)

f = go.FigureWidget([go.Scatter(x=x, y=y, mode='markers')])

scatter =[0]
colors = ['#a3a7e4'] * 100
scatter.marker.color = colors
scatter.marker.size = [10] * 100
f.layout.hovermode = 'closest'

# create our callback function
def update_point(trace, points, selector):
    c = list(scatter.marker.color)
    s = list(scatter.marker.size)
    for i in points.point_inds:
        c[i] = '#bae2be'
        s[i] = 20
        scatter.marker.color = c
        scatter.marker.size = s




See these Jupyter notebooks for even more FigureWidget examples.

In [3]:
Help on method on_click in module plotly.basedatatypes:

on_click(self, callback, append=False) method of plotly.graph_objs._scatter.Scatter instance
    Register function to be called when the user clicks on one or more
    points in this trace.
    Note: Callbacks will only be triggered when the trace belongs to a
    instance of plotly.graph_objs.FigureWidget and it is displayed in an
    ipywidget context. Callbacks will not be triggered on figures
    that are displayed using plot/iplot.
        Callable function that accepts 3 arguments
        - this trace
        - plotly.callbacks.Points object
        - plotly.callbacks.InputDeviceState object
    append : bool
        If False (the default), this callback replaces any previously
        defined on_click callbacks for this trace. If True,
        this callback is appended to the list of any previously defined
    >>> from plotly.callbacks import Points, InputDeviceState
    >>> points, state = Points(), InputDeviceState()
    >>> def click_fn(trace, points, state):
    ...     inds = points.point_inds
    ...     # Do something
    >>> trace.on_click(click_fn)
    Note: The creation of the `points` and `state` objects is optional,
    it's simply a convenience to help the text editor perform completion
    on the arguments inside `click_fn`