add how many people detected

app.py

@@ -33,6 +33,7 @@ if file_name is not None:
         # 打印结果
         print(persons)
         st.text(persons)
+        st.text(f"Number of persons detected: {len(persons)}")
         
         # 假设有一张原始图片，加载图片并截取出每个 "person" 的部分
         original_image = face_image
@@ -140,7 +141,7 @@ if file_name is not None:
 
         with row2:
             st.pyplot(pie_fig)  # Display the pie chart
-    
+
         with row3:
             st.pyplot(bar_fig)  # Display the bar chart