Fix gradio import

app.py

@@ -3,6 +3,8 @@ import torchaudio
 import spaces
 from typing import List
 import soundfile as sf
+import gradio as gr
+
 
 device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
 knn_vc = torch.hub.load('bshall/knn-vc', 'knn_vc', prematched=True, trust_repo=True, pretrained=True, device=device)