input validation

app.py

@@ -2,6 +2,7 @@ import gradio as gr
 import aiohttp
 import asyncio
 import os
+import re
 
 # API endpoint - model name
 API_URL = "https://api-inference.huggingface.co/models/Rahmat82/t5-small-finetuned-summarization-xsum"
@@ -9,7 +10,7 @@ SECRET_KEY = os.environ.get("summarizer")
 
 # asynchronous function
 async def summarize(text, retries=3):
-    if len(text) < 75:
+    if len(re.findall(r'[.!?]+', text)) < 3:
         return "<span style='color: red;'>Error: Input should contain more than a few sentences.</span>"
     headers = {"Authorization": f"Bearer {SECRET_KEY}"}
     data = {