Update app.py

app.py

@@ -9,6 +9,7 @@ gradio_input_file = None
 def process_ebook(ebook_file):
     import nltk
     nltk.download('averaged_perceptron_tagger_eng')
+    nltk.download('punkt_tab')
     #download the en_core_web_sm spacy model
     subprocess.run(["python", "-m", "spacy", "download", "en_core_web_sm"])
     global gradio_input_file  # Use the global variable to store the ebook file path