Update doc/python/horizontal-bar-charts.md

adding python decorator

Co-authored-by: Liam Connors <[email protected]>

Author: rl-utility-man

Diff for: doc/python/horizontal-bar-charts.md

@@ -221,8 +221,9 @@ fig.show()
 
 Diverging bar charts show counts of positive outcomes or sentiments to the right of zero and counts of negative outcomes to the left of zero, allowing the reader to easily spot areas of excellence and concern.  Implementing presentation-ready versions of them in Plotly requires a few non standard layout and legendrank options.
 
-```import pandas as pd
+```python
 import plotly.graph_objects as go
+import pandas as pd
 
 
 df = pd.read_csv('https://raw.githubusercontent.com/plotly/datasets/refs/heads/master/gss_2002_5_pt_likert.csv')