Update app.py

app.py

@@ -3,18 +3,12 @@ import pandas as pd
 import plotly.graph_objects as go
 import os
 from zipfile import ZipFile
-
+import plotly.io as pio
 try:
     import kaleido
-    import plotly.io as pio
 except ImportError:
     st.error("請安裝 'kaleido' 套件以啟用圖像導出功能：\n\n    $ pip install kaleido")
 
-# set kaleido config if installed, to try and fix the chinese font issue
-try:
-    pio.kaleido.scope.default_font = "Microsoft JhengHei, Noto Sans CJK, Arial"
-except:
-    st.error("字型設定錯誤，請確定是否安裝 kaleido")
 
 
 def load_data(uploaded_file):
@@ -92,18 +86,17 @@ def save_all_radar_charts(df, selected_columns, comparison_rows):
     for student in df['姓名']:
         if student in comparison_rows:
             continue
-        
-        fig = create_radar_chart(df, [student] + comparison_rows, selected_columns)
 
-        # 在這裡更新字型，確保字型有被設定
-        fig.update_layout(
-            font=dict(
-                family="Microsoft JhengHei, Noto Sans CJK, Arial"
-            )
-        )
+        fig = create_radar_chart(df, [student] + comparison_rows, selected_columns)
 
+        # 這裡使用 plotly.io.to_image 直接生成圖片
+        img_bytes = pio.to_image(fig, format="png",
+                                 engine="kaleido",
+                                 font_family="Microsoft JhengHei, Noto Sans CJK, Arial"
+                                 )
         file_path = os.path.join(output_dir, f"{student}_comparison.png")
-        fig.write_image(file_path, engine="kaleido")
+        with open(file_path, "wb") as f:
+            f.write(img_bytes)
 
     # 壓縮所有圖表
     zip_path = "radar_charts.zip"