inheritance predictions

Author: RaihanSharif

sprint-5-exercises/inheritance_check.py

@@ -0,0 +1,44 @@
+
+# parent class has two string fields, first_name, last_name
+# a method that return a string which joins the two names with a space
+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}"
+
+
+# extends parent class
+# add ability to change last name, store previous last names in a list
+# a method that prints first and last name as well as the original last name of Child
+class Child(Parent):
+    def __init__(self, first_name: str, last_name: str):
+        super().__init__(first_name, last_name)
+        self.previous_last_names = []
+
+    def change_last_name(self, last_name) -> 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()) # inherit from Parent class, output = "Elizaveta Alekseeva"
+print(person1.get_full_name()) # method of Child class, output = "Elizaveta Alekseeva" no previous surname
+person1.change_last_name("Tyurina") # changes last name of person1, adds "Alekseeva" to previous names list
+print(person1.get_name()) # last name has changed, output = "Elizaveta Tyurina"
+print(person1.get_full_name()) # includes maiden name, output = "Elizaveta Tyurina (née Alekseeva)"
+
+person2 = Parent("Elizaveta", "Alekseeva")
+print(person2.get_name()) # output = "Elizaveta Alekseeva"
+print(person2.get_full_name()) # AttrbuteError - the Parent class does not have get_full_name() method
+person2.change_last_name("Tyurina") # same again
+print(person2.get_name()) # no problems, same as line 40
+print(person2.get_full_name()) # again, no get_full_name() method in this Parent class. Same as line 41