comments that explain what each line does in predictInheritance.py

Author: shreefAhmedM

sprint5-prep-exercises/PredictInheritance.py

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+# Parent class stores a person's first name and last name
+class Parent:
+    def __init__(self, first_name: str, last_name: str):
+        self.first_name = first_name
+        self.last_name = last_name
+    # Returns the person's first and last name together
+    def get_name(self) -> str:
+        return f"{self.first_name} {self.last_name}"
+
+# Child inherits the fields and methods from Parent
+# It also allows the person to change their last name
+class Child(Parent):
+    def __init__(self, first_name: str, last_name: str):
+        super().__init__(first_name, last_name)
+        self.previous_last_names = []
+    # Changes the last name and saves the old name
+    def change_last_name(self, last_name) -> None:
+        self.previous_last_names.append(self.last_name)
+        self.last_name = last_name
+   # Returns the current name and the original 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}"
+# Create child object
+person1 = Child("Elizaveta", "Alekseeva")
+# Child inherits get_name() from Parent
+# Output: Elizaveta Alekseeva
+print(person1.get_name())
+# Child has its own get_full_name() method
+# Output: Elizaveta Alekseeva
+print(person1.get_full_name())
+# Change the last name 
+person1.change_last_name("Tyurina")
+# The current last name is now Tyurina
+# Output: Elizaveta Tyurina
+print(person1.get_name())
+# Shows the new name and the previous last name
+# Output: Elizaveta Tyurina (née Alekseeva)
+print(person1.get_full_name())
+# Create a Parent object
+person2 = Parent("Elizaveta", "Alekseeva")
+# Parent has get_name(), so this works
+# Output: Elizaveta Alekseeva
+print(person2.get_name())
+# This causes an AttributeError because Parent
+# does not have a get_full_name() method
+print(person2.get_full_name())
+# This also causes an AttributeError because Parent
+# does not have a change_last_name() method
+person2.change_last_name("Tyurina")
+# get_name() still works because it belongs to Parent
+# Output: Elizaveta Alekseeva
+print(person2.get_name())
+# This would cause another AttributeError
+# because get_full_name() only exists in Child
+print(person2.get_full_name())