Update QA_test.py

specify encoding while reading stop-words file

QA_data/QA_test.py

@@ -9,7 +9,7 @@
 
 cursor = conn.cursor()
 stop_words = []
-with open('./QA_data/stop_words.txt') as f:
+with open('./QA_data/stop_words.txt', encoding='gbk') as f:
     for line in f.readlines():
         stop_words.append(line.strip('\n'))