Use the function to extract the text

app.py

@@ -1,4 +1,5 @@
 import gradio as gr
+from functions import extract_text
 
 
 def update(name='default text'):
@@ -16,7 +17,7 @@ with gr.Blocks() as demo:
                                  show_label=False)
             btn_extract_text = gr.Button("Extraer texto")
         out_url_text = gr.Textbox(label="Texto extraído")
-        btn_extract_text.click(fn=update, inputs=inp_url, outputs=out_url_text)
+        btn_extract_text.click(fn=extract_text, inputs=inp_url, outputs=out_url_text)
 
     # Summary section
     gr.Markdown("## Elaborar resumen")

functions.py

@@ -1,7 +1,10 @@
 import requests
 from bs4 import BeautifulSoup
 
-def extract_text(url):
+
+def extract_text(url: str):
+    if url is None or url.strip() == '':
+        return ''
     response = requests.get(url)
     soup = BeautifulSoup(response.text, "html.parser")
     text = '\n\n'.join(map(lambda p: p.text, soup.find_all('p')))