also refactored core.meow into seperate files in hope that it'll help solve circular imports

core/base_conductor.py

@@ -0,0 +1,46 @@
+
+"""
+This file contains the base MEOW conductor defintion. This should be inherited 
+from for all conductor instances.
+
+Author(s): David Marchant
+"""
+
+from typing import Any, Tuple, Dict
+
+from core.correctness.vars import get_drt_imp_msg
+from core.correctness.validation import check_implementation
+
+
+class BaseConductor:
+    # Directory where queued jobs are initially written to. Note that this 
+    # will be overridden by a MeowRunner, if a handler instance is passed to 
+    # it, and so does not need to be initialised within the handler itself.
+    job_queue_dir:str
+    # Directory where completed jobs are finally written to. Note that this 
+    # will be overridden by a MeowRunner, if a handler instance is passed to 
+    # it, and so does not need to be initialised within the handler itself.
+    job_output_dir:str
+    def __init__(self)->None:
+        """BaseConductor Constructor. This will check that any class inheriting
+        from it implements its validation functions."""
+        check_implementation(type(self).execute, BaseConductor)
+        check_implementation(type(self).valid_execute_criteria, BaseConductor)
+
+    def __new__(cls, *args, **kwargs):
+        """A check that this base class is not instantiated itself, only 
+        inherited from"""
+        if cls is BaseConductor:
+            msg = get_drt_imp_msg(BaseConductor)
+            raise TypeError(msg)
+        return object.__new__(cls)
+
+    def valid_execute_criteria(self, job:Dict[str,Any])->Tuple[bool,str]:
+        """Function to determine given an job defintion, if this conductor can 
+        process it or not. Must be implemented by any child process."""
+        pass
+
+    def execute(self, job_dir:str)->None:
+        """Function to execute a given job directory. Must be implemented by 
+        any child process."""
+        pass