Make Dog a dataclass and create three dogs

heaven.py

@@ -1,6 +1,19 @@
+from dataclasses import dataclass
+
+
+@dataclass
 class Dog:
+    name: str
+
     def __del__(self):
         global heaven
         heaven.append(self)
 
+
 heaven = []
+
+if __name__ == "__main__":
+    Dog("Fido")
+    Dog("Rex")
+    Dog("Spot")
+    print(heaven)