Update app.py

app.py

@@ -26,6 +26,8 @@ def process_csv(file):
     if file is None:
         gr.Warning("No file uploaded")
 
+    acc_data = []
+
     # Read and prep accelerometer data    
     with open(file, 'r', newline='') as csvfile:
         csv_reader = csv.reader(csvfile)