raise gr.Error("lesson_words, original_article, original_word_count are required. Please upload the lesson csv file.")

app.py

@@ -81,6 +81,10 @@ def validate_article(generated_article, lesson_words, base_chars, original_word_
     return result
 
 def generate_new_article(lesson_words, original_article, original_word_count, base_chars, model_name):
+    # check lesson_words, original_article, original_word_count exist
+    if not lesson_words or not original_article or not original_word_count:
+        raise gr.Error("lesson_words, original_article, original_word_count are required. Please upload the lesson csv file.")
+
     attempt = 0
     max_attempts = 3
     generated_article = ""