Update app.py

app.py

@@ -64,6 +64,10 @@ def get_user_annotations_dictionary(
 
 
 
+import altair as alt
+import pandas as pd
+import os
+
 import altair as alt
 import pandas as pd
 import os
@@ -83,7 +87,7 @@ def donut_chart() -> alt.Chart:
 
     # Create the base of the donut chart
     base = alt.Chart(source).encode(
-        theta=alt.Theta(field="values", type="quantitative", stack=True),
+        theta=alt.Theta(field="values", type="quantitative"),
         color=alt.Color(field="color", type="nominal", legend=None),  # Use the colors defined in the DataFrame
         tooltip=["category", "values"]
     )
@@ -91,10 +95,10 @@ def donut_chart() -> alt.Chart:
     # Create the arcs for the donut chart
     arcs = base.mark_arc(innerRadius=100, outerRadius=120, stroke="#fff")
 
-    # Add text labels in the middle of the donut chart
-    text = base.mark_text(radius=140, size=20, align='center').encode(
+    # Add text labels
+    text = base.mark_text(radiusOffset=20, size=20).encode(
         text=alt.Text("values:Q"),
-        angle=alt.Angle(field="values", type="quantitative", aggregate='sum', stack=True)  # Calculate the mid-angle position for the labels
+        color=alt.value('black')  # Setting text color to black for better readability
     )
 
     # Combine the arcs and text