import plotly.graph_objects as go

fig = go.Figure(go.Heatmap(
    z=[[1, 20, 30],
       [20, 1, 60],
       [30, 60, 1]])
)
fig.show()

import plotly.graph_objects as go

fig = go.Figure(go.Heatmap(
    z=[[1, 20, 30],
       [20, 1, 60],
       [30, 60, 1]])
)
fig.show()
