Update app.py

app.py

@@ -147,7 +147,7 @@ def cellpose_segment(img_input):
 #    description="upload an image, then cellpose will segment it at a max size of 400x400 (for full functionality, 'pip install cellpose' locally)"
 #)
 
-def download_function: 
+def download_function(): 
     b1 = gr.DownloadButton("Download masks as TIFF", visible=False)
     b2 = gr.DownloadButton("Download outline image as PNG", visible=False)
     return b1, b2