abstract class, method

Author: Vitalii Cherkashyn

class-abstract.py

@@ -0,0 +1,22 @@
+import abc
+from abc import ABC
+
+class Parent(ABC):
+
+    @abc.abstractmethod
+    def who_am_i(self):
+        return "parent"
+
+
+class Child(Parent):
+
+    def who_am_i(self):
+        return "child"
+
+if __name__=="__main__":
+    print(Child().who_am_i()) # child
+    print( issubclass(Child, Parent) ) # True
+    print( isinstance(Child(), Child) ) # True
+    print( isinstance(Child(), Parent) ) # True
+    print( isinstance(object(), Parent) ) # False
+    # Parent() - can't create abstract class