updated processor module

csst/core/processor.py

-from abc import ABCMeta, abstractmethod
+from abc import ABC, ABCMeta, abstractmethod
 from enum import Enum
 
 
@@ -8,26 +8,52 @@ class CsstProcStatus(Enum):
     ioerror = 1
     runtimeerror = 2
 
-
 #     self['empty'].info = 'Not run yet.'
 #     self['normal'].info = 'This is a normal run.'
 #     self['ioerror'].info = 'This run is exceptionally stopped due to IO error.'
 #     self['runtimeerror'].info = 'This run is exceptionally stopped due to runtime error.'
 
-class CsstProcessor(metaclass=ABCMeta):
+
+class CsstProcessor(ABC):
 
     def __init__(self, **kwargs):
-        self._status = CsstProcStatus()
+        # self._status = CsstProcStatus()
+        pass
 
     @abstractmethod
     def prepare(self, **kwargs):
-        pass
+        # do your preparation here
+        raise NotImplementedError
 
     @abstractmethod
-    def run(self, kwargs):
-        """ """
-        return self._status
+    def run(self, **kwargs):
+        # run your pipeline
+        raise NotImplementedError
 
     @abstractmethod
     def cleanup(self):
-        pass
+        # clean up environment
+        raise NotImplementedError
+
+
+class CsstDemoProcessor(CsstProcessor):
+
+    def __init__(self, **kwargs):
+        super().__init__()
+
+    def some_function(self, **kwargs):
+        print("some function")
+
+    def prepare(self):
+        print("prepare")
+
+    def run(self):
+        print("run")
+
+    def cleanup(self):
+        print("clear up")
+
+
+if __name__ == "__main__":
+    cp = CsstDemoProcessor()
+