diff --git a/app.py b/app.py
index 772f745..eb13980 100644
--- a/app.py
+++ b/app.py
@@ -1,10 +1,10 @@
-from flask import Flask
+from flask import Flask,session,request,redirect,render_template
 
 app = Flask(__name__)
 
 @app.route('/')
-def hello():
-    return "小学期快乐！"
+def hello_world():  # put application's code here
+    return session.clear()
 
 if __name__ == '__main__':
     app.run()
\ No newline at end of file