add abc file

core/abc.py

+#!/usr/bin/env python3
+
+from pydoc import locate
+
+from agora.abc import ProcessABC
+
+
+class PostProcessABC(ProcessABC):
+    """
+    Extend ProcessABC to add as_function, allowing for all PostProcesses to be called as functions
+    almost directly.
+    """
+
+    def __init__(self, *args, **kwargs):
+        super().__init__()
+
+    @classmethod
+    def as_function(cls, data, *args, **kwargs):
+        # Find the parameter's default
+        parameters = get_parameters(cls.__name__).default(*args, **kwargs)
+        return cls(parameters=parameters).run(data)
+
+
+def get_process(process, suffix=""):
+    """
+    Dynamically import a process class from the 'processes' folder.
+    Assumes process filename and class name are the same
+    """
+    location = f"postprocessor.core.processes.{process}.{process}{suffix}"
+    found = locate(location)
+    if found == None:
+        raise Exception(f"{location} not found")
+    return found
+
+
+def get_parameters(self, process):
+    """
+    Dynamically import parameters from the 'processes' folder.
+    Assumes parameter is the same name as the file with 'Parameters' added at the end.
+    """
+    return get_process(process, suffix="Parameters")