save project

cccp.py

@@ -8,7 +8,8 @@ print(b)
 b.append("关兴")
 b.append("关兴")
 print (b)
 print (b)
 
 
-b.extend("黄忠，赵云")
+c=["黄忠","赵云"]
+b.extend(c)
 print(b)
 print(b)