diff --git a/doc/python/box-plots.md b/doc/python/box-plots.md
index dbaca729096..5ca79d51b0f 100644
--- a/doc/python/box-plots.md
+++ b/doc/python/box-plots.md
@@ -233,16 +233,10 @@ import plotly.graph_objects as go
 
 fig = go.Figure()
 
-fig.add_trace(go.Box(y=[
-        [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
-        [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
-        [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]
-      ], name="Precompiled Quartiles"))
-
-fig.update_traces(q1=[ 1, 2, 3 ], median=[ 4, 5, 6 ],
+fig.add_trace(go.Box(q1=[ 1, 2, 3 ], median=[ 4, 5, 6 ],
                   q3=[ 7, 8, 9 ], lowerfence=[-1, 0, 1],
-                  upperfence=[5, 6, 7], mean=[ 2.2, 2.8, 3.2 ],
-                  sd=[ 0.2, 0.4, 0.6 ], notchspan=[ 0.2, 0.4, 0.6 ] )
+                  upperfence=[7, 8, 9], mean=[ 2.2, 2.8, 3.2 ],
+                  sd=[ 0.2, 0.4, 0.6 ], notchspan=[ 0.2, 0.4, 0.6 ], name="Precompiled Quartiles"))
 
 fig.show()
 ```