inheritance exercise

Author: enjoy15

sprint5-prep-exercises/inheritance.py

@@ -0,0 +1,47 @@
+class Parent:
+    def __init__(self, first_name: str, last_name: str):
+        self.first_name = first_name
+        self.last_name = last_name
+
+    def get_name(self) -> str:
+        return f"{self.first_name} {self.last_name}"
+
+
+class Child(Parent):
+    def __init__(self, first_name: str, last_name: str):
+        super().__init__(first_name, last_name)
+        self.previous_last_names: list[str] = []
+
+    def change_last_name(self, last_name: str) -> None:
+        self.previous_last_names.append(self.last_name)
+        self.last_name = last_name
+
+    def get_full_name(self) -> str:
+        suffix = ""
+        if len(self.previous_last_names) > 0:
+            suffix = f" (née {self.previous_last_names[0]})"
+        return f"{self.first_name} {self.last_name}{suffix}"
+
+person1 = Child("Elizaveta", "Alekseeva")
+print(person1.get_name())
+print(person1.get_full_name())
+person1.change_last_name("Tyurina")
+print(person1.get_name())
+print(person1.get_full_name())
+
+person2 = Parent("Elizaveta", "Alekseeva")
+print(person2.get_name())
+if isinstance(person2, Child):
+    print(person2.get_full_name())
+    person2.change_last_name("Tyurina")
+    print(person2.get_name())
+    print(person2.get_full_name())
+else:
+    print("Parent does not have get_full_name() or change_last_name().")
+
+# Predictions vs actual output (play computer):
+# 1) Child inherits get_name() from Parent.
+# 2) Child-specific get_full_name() shows the maiden name after changing last name.
+# 3) Parent supports get_name() only; Child-only methods are unavailable on Parent.
+
+""" When I played computer, I predicted that Child would inherit get_name() from Parent, so person1.get_name() should work exactly like in Parent, while person1.get_full_name() would only exist on Child and add extra detail after a last-name change. Running the code confirmed this: before changing the name, both methods show “Elizaveta Alekseeva”, and after change_last_name("Tyurina"), get_full_name() includes the maiden-name suffix (née Alekseeva). For person2 (a Parent), only get_name() is available, which shows that inheritance gives Child all parent behavior plus additional child-specific methods, but not the other way around. """