Update app.py

app.py

@@ -211,8 +211,8 @@ def predict_sentiment(model, sentence, vocab, label_mapping=None):
 
 def process_input(text_input, file):
     content = ""
-    if text:
-        content += text + "\n"
+    if text_input:
+        content += text_input + "\n"
     if file is not None:
         content += file.read().decode('utf-8') + "\n"
     # Tách câu: theo dấu ., ?, ! hoặc xuống dòng