Update app.py

app.py

@@ -1,13 +1,25 @@
+from pathlib import Path
 import gradio as gr
 
-def greet(name):
-    return "Hello " + name + "!!"
+def upload_file(filepath):
+    name = Path(filepath).name
+    return [gr.UploadButton(interactive=False), 
+            gr.DownloadButton( value=filepath, interactive=True)] #label=f"Download {name}",
 
-with gr.Blocks(theme=gr.themes.Base(radius_size="none")) as demo:
+def download_file():
+    return [gr.UploadButton(interactive=True), gr.DownloadButton(interactive=False)]
+
+with gr.Blocks(theme=gr.themes.Base(radius_size=gr.themes.sizes.radius_none)) as demo:
+    tb = gr.Textbox(value = "First upload a file and and then you'll be able download it (but only once!)")
     with gr.Row():
-        text1 = gr.Textbox(value="Yuvi")
-        text2 = gr.Textbox()
-    btn = gr.Button("GO!")
-    btn.click(fn=greet, inputs=text1, outputs=text2)
+      with gr.Column(scale=1):
+        u = gr.UploadButton(icon='icon4.png', elem_classes="hamburger-button", label="", file_count="single")
+      with gr.Column(scale=1):
+        d = gr.DownloadButton( icon='icon1.png', elem_classes="hamburger-button", label="", interactive=False)
+      with gr.Column(scale=1):
+        t = gr.Textbox(visible=True, )
+
+    u.upload(upload_file, u, [u, d])
+    d.click(download_file, None, [u, d])
 
-demo.launch()                   
+demo.launch()