Display only single line on hover, hide all other lines

Question

Is there is a way to hide all other lines on a figure, when I am hovering a single one?

Example:

import numpy as np
import plotly.express as px

np.random.seed(42)
data = np.random.randint(0, 10, (5, 10))
fig = px.line(data_frame=pd.DataFrame(data))

fig.show()

will produce:

and I want this, when I hover particular line (but without manually switching off all other lines and keeping X, Y axes dims):

UPD: inside jupyter notebook

Answer 1

import plotly.graph_objects as go
import numpy as np
import pandas as pd

# callback function for on_hover
def hide_traces_on_hover(trace, points, selector):
    if len(points.point_inds)==1: # identify hover
        i = points.trace_index # get the index of the hovered trace
        f.data[i].visible = True # keep the hovered trace visible
        # create a list of traces you want to hide
        hide_traces = [l_trace for idx, l_trace in enumerate(f.data) if idx != i] 
        for l_trace in hide_traces: # iterate over hide_traces
            l_trace.visible = 'legendonly' # hide all remaining traces
    
# callback function to unhide traces on click
def unhide_traces_on_click(trace, points, selector):
    for l_trace in f.data:
        l_trace.visible = True
        
# your sample data frame
np.random.seed(42)
data = np.random.randint(0, 10, (5, 10))
df = pd.DataFrame(data)

f = go.FigureWidget() # create figure widget

f.update_yaxes(autorange=False) # set auto range to false
# define the range of the y-axis using min and max functions
f.update_layout(yaxis_range=[df.values.min()-1, df.values.max()+1])

# create your traces from the data frame
for col in df.columns:
    trace = go.Scatter(x=df.index, y=df[col], mode='lines+markers')
    f.add_trace(trace)

# assign your functions to each trace
for trace in f.data:
    trace.on_hover(hide_traces_on_hover)
    trace.on_click(unhide_traces_on_click)

f

If you are running into issues, here is the jupyter notebook support documentation for using FigureWidget and here is the jupyter lab support documentation. Make sure you have the ipywidgets package installed. Also, just as a FYI, here is the FigureWidget documentation.

When you hover over a marker in the graph.

When you click on any marker of the visible trace all the hidden traces will become visible again.