Example 2 for Butterfly chart (version2)

Author: SimaRaha

doc/python/horizontal-bar-charts.md

@@ -216,6 +216,88 @@ fig.update_layout(annotations=annotations)
 
 fig.show()
 ```
+# *Example2 for Butterfly chart version 2
+
+import pandas as pd
+import plotly.graph_objects as go
+
+data = {
+    "State": ["California", "Texas", "Florida", "New York", "Illinois", "Pennsylvania", "Ohio", "Georgia", "North Carolina", "Michigan"],
+    "Strongly Disagree": [-12, -15, -10, -8, -7, -9, -10, -6, -7, -8],
+    "Disagree": [-22, -25, -18, -20, -19, -21, -18, -16, -17, -15],
+    "Agree": [32, 30, 35, 33, 36, 34, 38, 40, 37, 38],
+    "Strongly Agree": [28, 30, 33, 31, 34, 36, 35, 38, 36, 37],
+    "Neutral": [18, 20, 22, 19, 20, 21, 25, 23, 22, 24]
+}
+
+df = pd.DataFrame(data)
+
+fig = go.Figure()
+
+# Define diverging categories and their colors
+categories = ["Strongly Disagree", "Disagree", "Agree", "Strongly Agree"]
+color_map = {
+     "Strongly Disagree": "darkblue",
+    "Disagree": "lightblue",
+    "Agree": "orange",
+    "Strongly Agree": "red",
+   
+}
+
+# Add diverging bars for each category
+for category in categories:
+    fig.add_trace(go.Bar(
+        y=df["State"],  
+        x=df[category],  
+        name=category,
+        orientation="h",  
+        marker=dict(color=color_map[category])
+    ))
+
+
+fig.add_trace(go.Bar(
+    y=df["State"], 
+    x=df["Neutral"], 
+    name="Neutral", 
+    orientation="h", 
+    marker=dict(color="gray"),
+    xaxis="x2"  # Assign Neutral to a second x-axis
+))
+
+# Update layout
+fig.update_layout(
+    title="It is the responsibility of government to reduce income differences (U.S. States)",
+    xaxis=dict(
+        title="Percentage of Responses (Diverging Categories)",
+        zeroline=True, 
+        zerolinecolor="black",
+        range=[-50, 50],  
+        domain=[0, 0.8]  
+    ),
+    xaxis2=dict(
+        title="Neutral Responses (%)",  
+        range=[0, 30],  
+        domain=[0.85, 1.0]  
+    ),
+    yaxis=dict(
+        title="State",
+        autorange="reversed"  
+    ),
+    barmode="relative",  
+    plot_bgcolor="white",
+    height=600,
+    width=1000,
+    legend=dict(
+        orientation="h",
+        yanchor="bottom",
+        y=1.02,
+        xanchor="center",
+        x=0.5
+    )
+)
+
+
+fig.show()
 
 ### Bar Chart with Line Plot
 
@@ -335,4 +417,4 @@ fig.show()
 
 ### Reference
 
-See more examples of bar charts and styling options [here](https://plotly.com/python/bar-charts/).<br> See https://plotly.com/python/reference/bar/ for more information and chart attribute options!
+See more examples of bar charts and styling options [here](https://plotly.com/python/bar-charts/).<br> See https://plotly.com/python/reference/bar/ for more information and chart attribute options!