auto save

diy4.py

+class Hero:
+    def __init__(self,name,hp,attack):
+        self.level=1
+        self.hp=300
+        self.attack=20
+    def upgrade(self):
+        self.level += 1
+        self.hp += 100
+        self.attack += 20
+houyi=Hero('后裔',200,50)
+houyi.upgrade()
+print(houyi.level,houyi.hp,houyi.attack)
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