differentiated papermill and python jobs more clearly

rules/__init__.py

@@ -1,2 +1,3 @@
 
 from rules.file_event_jupyter_notebook_rule import FileEventJupyterNotebookRule
+from rules.file_event_python_rule import FileEventPythonRule

rules/file_event_python_rule.py

@@ -0,0 +1,30 @@
+
+"""
+This file contains definitions for a MEOW rule connecting the FileEventPattern
+and PythonRecipe.
+
+Author(s): David Marchant
+"""
+from core.correctness.validation import check_type
+from core.meow import BaseRule
+from patterns.file_event_pattern import FileEventPattern
+from recipes.python_recipe import PythonRecipe
+
+# TODO potentailly remove this and just invoke BaseRule directly, as does not
+# add any functionality other than some validation.
+class FileEventPythonRule(BaseRule):
+    pattern_type = "FileEventPattern"
+    recipe_type = "PythonRecipe" 
+    def __init__(self, name: str, pattern:FileEventPattern, 
+            recipe:PythonRecipe):
+        super().__init__(name, pattern, recipe)
+
+    def _is_valid_pattern(self, pattern:FileEventPattern)->None:
+        """Validation check for 'pattern' variable from main constructor. Is 
+        automatically called during initialisation."""
+        check_type(pattern, FileEventPattern)
+
+    def _is_valid_recipe(self, recipe:PythonRecipe)->None:
+        """Validation check for 'recipe' variable from main constructor. Is 
+        automatically called during initialisation."""
+        check_type(recipe, PythonRecipe)