Plotting on a 1-D number axis.

plotly-1d-plot.py

import plotly.graph_objects as go
fig = go.Figure()

xdata = [(1 - 1/i) for i in range(1, 15)]

fig.add_trace(go.Scatter(
    x=xdata, y=len(xdata)*[0], mode='markers', marker_size=10, marker_color='red'
))
fig.update_xaxes(showgrid=False)
fig.update_yaxes(showgrid=False, 
                 zeroline=True, zerolinecolor='black', zerolinewidth=3,
                 showticklabels=False)
fig.update_layout(height=200, plot_bgcolor='white')
fig.show()