Update app.py

app.py

@@ -10,7 +10,7 @@ install("pixeltable==0.2.20")
 install("git+https://github.com/Megvii-BaseDetection/YOLOX.git")
 
 import gradio as gr
-import gradio.themes as Soft
+from gradio.themes import Soft
 import pixeltable as pxt
 from pixeltable.iterators import FrameIterator
 from pixeltable.ext.functions.yolox import yolox
@@ -86,7 +86,7 @@ def process_video(video_file, model_id, threshold, progress=gr.Progress()):
     return output_video, frame_gallery
 
 # Gradio interface
-with gr.Blocks(theme=Soft) as demo:
+with gr.Blocks(theme=Soft()) as demo:
     gr.Markdown(
         """
         <div max-width: 800px; margin: 0 auto;">