auto save

diy2.py

@@ -4,7 +4,11 @@ class Person:
         self.hp = hp
         self.attack = attack
 
+    def upgrade(self):
+        yase.level += 1
+        yase.hp += 20
+        yase.attack += 4
+        
 yase = Person(1, 99, 20)
-houyi = Person(2, 100, 70)
-print(yase.level)
-print(houyi.level)
\ No newline at end of file
+yase.upgrade()
+print(yase.hp)
\ No newline at end of file