Update app.py

app.py

@@ -189,9 +189,9 @@ if not os.path.exists(nltk_data_path):
     os.makedirs(nltk_data_path)
 
 # Download NLTK resources only if not already present
-for resource in ['punkt', 'stopwords', 'wordnet']:
+for resource in ['punkt_tab', 'stopwords', 'wordnet']:
     try:
-        nltk.data.find(f'tokenizers/{resource}' if resource == 'punkt' else f'corpora/{resource}')
+        nltk.data.find(f'tokenizers/{resource}' if resource == 'punkt_tab' else f'corpora/{resource}')
     except LookupError:
         nltk.download(resource, download_dir=nltk_data_path)