add stubs for pluggable implementations

dynamic.py

@@ -0,0 +1,27 @@
+import sys
+import importlib
+import configparser
+
+from implementation import *
+from implementation import ibuddy
+
+# Read chosen implementation from config
+try:
+    config = configparser.ConfigParser()
+    config.read('config.ini')
+    implementation = config.get('general', 'implementation')
+except:
+    sys.exit('[error] Failed to read config file!')
+    
+# Load implementation
+implementations = [subclass.__name__ for subclass in ibuddy.__subclasses__()]
+try:
+    if implementation in implementations:
+        ibuddy = getattr(globals()[implementation], implementation)()
+    else:
+        raise
+except:
+    sys.exit('[error] Failed to load implementation!')
+
+# Fun!
+ibuddy.test()

implementation/__init__.py

@@ -0,0 +1,13 @@
+import os
+import glob
+import abc
+
+modules = glob.glob(os.path.dirname(__file__) + '/*.py')
+__all__ = [os.path.basename(f)[:-3] for f in modules]
+
+class ibuddy:
+    __metaclass__ = abc.ABCMeta
+
+    @abc.abstractmethod
+    def test(self):
+        return

implementation/local.py

@@ -0,0 +1,5 @@
+from . import ibuddy
+
+class local(ibuddy):
+    def test(self):
+        print('test local')

implementation/remote.py

@@ -0,0 +1,5 @@
+from . import ibuddy
+
+class remote(ibuddy):
+    def test(self):
+        print('test remote')