Update app.py

app.py

@@ -11,7 +11,7 @@ def greet_json():
 @app.get("/kline")
 def get_kline(symbol : str):
     res = requests.get("https://api.binance.com/dapi/v1/klines?symbol="+symbol)
-    print(res.header)
+    print(res.headers)
     if res.status_code == 200:
         return res.json()
     return {"error":res.text}