Update app.py

app.py

@@ -9,6 +9,7 @@ import gluonnlp as nlp
 import numpy as np
 from tqdm import tqdm, tqdm_notebook
 import pandas as pd
+import ast
 
 #  Hugging Face를 통한 모델 및 토크나이저 Import
 from kobert_tokenizer import KoBERTTokenizer