added abstract class👩‍💻

rahulhgdev · web-flow · commit 0fce51cdad54 · 2021-01-21T18:09:28.000+05:30
diff --git a/Beginner_Level/Abstract Class.py b/Beginner_Level/Abstract Class.py
@@ -0,0 +1,23 @@
+
+from abc import ABC, abstractclassmethod          # abc - abstract base class & python don't provide any abstract class there is a built-in modules which is in this line
+
+
+class Shape(ABC):
+    @abstractclassmethod        # its decorator
+    def area(self): pass        # empty method
+
+    #@abstractclassmethod          # abstractmethod is a mthd which must be implemented in subclass
+    def perimeter(self):pass
+
+class Square(Shape):
+    def __init__(self, side):
+        self.__side = side
+    def area(self):
+        return self.__side * self.__side
+    def perimeter(self):
+        return 4 * self.__side
+
+
+square = Square(5)    # it can't be intantiated bcoz its abstract class
+print(square.area())
+print(square.perimeter())
