Update app.py

app.py

@@ -1,6 +1,7 @@
 import gradio as gr
 from transformers import pipeline
 from presentation import main_title, examples
+from typing_extensions import Required
 
 model = 'hackathon-pln-es/Detect-Acoso-Twitter-Es'
 
@@ -18,6 +19,7 @@ def classify(text):
     return cls(text)[0]['label']
 
 gr.Interface(fn=classify, inputs=[gr.inputs.Textbox(
+                Required,
                 label="Texto a analizar:",
                 placeholder="Introduce o elige un ejemplo de twit:",
                 optional=False,