pages/examples/dumbbell.py

import pandas as pd
import vizro.models as vm
import vizro.plotly.express as px
from plotly import graph_objects as go
from vizro import Vizro
from vizro.models.types import capture

salaries = pd.DataFrame(
    {
        "Job": ["Developer", "Analyst", "Manager", "Specialist"] * 2,
        "Salary": [60000, 55000, 70000, 50000, 130000, 110000, 96400, 80000],
        "Range": ["Min"] * 4 + ["Max"] * 4,
    }
)


@capture("graph")
def dumbbell(data_frame: pd.DataFrame, x: str, y: str, color: str) -> go.Figure:
    # Add two dots to plot
    fig = px.scatter(data_frame, y=y, x=x, color=color)

    # Add lines between dots
    for y_value, group in data_frame.groupby(y):
        fig.add_shape(
            type="line",
            layer="below",
            y0=y_value,
            y1=y_value,
            x0=group[x].min(),
            x1=group[x].max(),
            line_color="grey",
            line_width=3,
        )

    # Increase size of dots
    fig.update_traces(marker_size=12)
    return fig


page = vm.Page(
    title="Dumbbell",
    components=[vm.Graph(figure=dumbbell(salaries, y="Job", x="Salary", color="Range"))],
)

dashboard = vm.Dashboard(pages=[page])
Vizro().build(dashboard).run()