fix: ABC and ABCMeta usecase and abc module decorator.

Author: praisetompane

4_experiments/2_standard_library/29_python_runtime_services/9_abcs/2_decorators/TestClassMethodDecorator.py

@@ -0,0 +1,44 @@
+import abc
+from abc import abstractmethod
+
+class TestClassMethodDecorator():
+    @staticmethod
+    def method_static_method():
+        print("In static method")
+
+    @classmethod    
+    def method_class_method(cls):
+        print("In class method")
+
+    @abstractmethod
+    def method_abstract(self):
+        print("In abstract method")
+
+    @staticmethod
+    @abstractmethod
+    def method_abstract_static():
+        print("In abstract static method")
+
+    def invoke_method_static_method_in_class(self):
+        """
+        Q: why can't we do this?
+        """
+        method_static_method()
+
+
+if __name__ == "__main__":
+    print(f"Test: {TestClassMethodDecorator.__name__}")
+    a = TestClassMethodDecorator()
+    a.method_static_method()
+    TestClassMethodDecorator.method_static_method()
+    # a.invoke_method_static_method_in_class()
+
+    a.method_abstract()
+    # TestClassMethodDecorator.method_abstract()
+    TestClassMethodDecorator.method_abstract_static()
+    
+    a.method_class_method()
+    TestClassMethodDecorator.method_class_method()
+
+    print(abc.get_cache_token())
+    print(type(abc.get_cache_token()))