Update app.py

app.py

@@ -1,4 +1,5 @@
 import gradio as gr
+import time
 import pandas as pd
 import pandas_bokeh
 import matplotlib.pyplot as plt
@@ -62,8 +63,9 @@ def pyhighchats():
     H = Highchart()
     data = list(range(1,20))
     H.add_data_set(data,'line')
-    y=H.save_file('test.html')
-    return y
+    H.save_file('test.html')
+    time.sleep(5)
+    return 'test.html'
     
 demo=gr.Blocks()
 with demo: