Update app.py

app.py

@@ -1,7 +1,19 @@
-import dash
-from dash import dcc, html, callback
+# 系統套件
 import os
+from datetime import datetime, timedelta
+
+# 數據處理
 import pandas as pd
+import numpy as np
+import yfinance as yf
+
+# Dash & Plotly
+from dash import Dash, dcc, html, callback
+import dash
+import plotly.express as px
+import plotly.graph_objects as go
+from plotly.subplots import make_subplots
+
 
 
 app = dash.Dash(__name__, suppress_callback_exceptions=True)