Merge branch 'new-oop-exercise'

somacdivad · somacdivad · commit 6ba404b26913 · 2019-03-26T17:33:39.000-05:00
diff --git a/ch10-primer-on-oop/3-inherit-from-other-classes.py b/ch10-primer-on-oop/3-inherit-from-other-classes.py
@@ -25,18 +25,19 @@ def speak(self, sound="Bark"):
 
 
 # Exercise 2
-# Modified Dog class
-class Dog:
-    species = "Canis familiaris"
+# Rectangle and Square classes
+class Rectangle:
+    def __init__(self, length, width):
+        self.length = length
+        self.width = width
 
-    def __init__(self, name, age):
-        self.name = name
-        self.age = age
+    def area(self):
+        return self.length * self.width
 
-    def __str__(self):
-        return f"{self.name} is {self.age} years old"
 
-    def speak(self, sound):
-        if not isinstance(sound, str):
-            raise TypeError("sound should be a string")
-        return f"{self.name} says {sound}"
+class Square(Rectangle):
+    def __init__(self, side_length):
+        super().__init__(side_length, side_length)
+
+square = Square(4)
+print(square.area())
