Update run.py

run.py

@@ -8,8 +8,8 @@ dataset_options = [
     "OpenVideo/pexels-raw",
     "OpenVideo/Sample-2k",
 ]
-fetch_files = []
-fetch_files_select_idx = 0
+global fetch_files
+global fetch_files_select_idx
 
 def login(token):
     u = HFUser.from_token(token)
@@ -22,6 +22,7 @@ def list_dataset(u, repo):
     print(f"repo is: {repo}")
     files = u.list_dataset(repo)
     fetch_files = files
+    fetch_files_select_idx = 0
     return gr.Dropdown(value=files[0], choices=files), gr.Column(visible=True), gr.Column(visible=False)
 
 def fetch_parquet(u, fname):