fix command system

src/command_system/dispatcher.py

@@ -66,11 +66,13 @@ def traverse_commands(container):
             yield attribute
 
 def is_command(attribute):
-    from framework import Command
+    from .framework import Command
     return isinstance(attribute, Command)
 
 def is_root(namespace):
     metaclass = namespace.get("__metaclass__", None)
+    if not metaclass:
+        return False
     return issubclass(metaclass, Dispatchable)
 
 def get_command(host, name):

src/command_system/framework.py

@@ -28,7 +28,7 @@ from .dispatcher import get_command, list_commands
 from .mapping import parse_arguments, adapt_arguments
 from .errors import DefinitionError, CommandError, NoCommandError
 
-class CommandHost(object):
+class CommandHost(metaclass=Host):
     """
     Command host is a hub between numerous command processors and
     command containers. Aimed to participate in a dispatching process in
@@ -40,7 +40,7 @@ class CommandHost(object):
     """
     __metaclass__ = Host
 
-class CommandContainer(object):
+class CommandContainer(metaclass=Container):
     """
     Command container is an entity which holds defined commands,
     allowing them to be dispatched and proccessed correctly. Each
@@ -143,7 +143,7 @@ class CommandProcessor(object):
     def list_commands(self):
         commands = list_commands(self.COMMAND_HOST)
         commands = dict(commands)
-        return sorted(commands.values())
+        return sorted(list(commands.values()), key=lambda k: k.__repr__())
 
 class Command(object):
 

src/command_system/mapping.py

@@ -230,8 +230,8 @@ def adapt_arguments(command, arguments, args, opts):
 
     # Stripping down position information supplied with arguments and
     # options as it won't be needed again.
-    args = map(lambda t: t[0], t[1])
+    args = list(map(lambda t: t[0], args))
-    opts = map(lambda t: (t[0], t[1]), opts)
+    opts = list(map(lambda t: (t[0], t[1]), opts))
 
     # If command has extra option enabled - collect all extra arguments
     # and pass them to a last positional argument command defines as a

src/plugins/pluginmanager.py

@@ -41,7 +41,7 @@ from plugins.helpers import log, log_calls, Singleton
 from plugins.helpers import GajimPluginActivateException
 from plugins.plugin import GajimPlugin, GajimPluginException
 
-class PluginManager(object):
+class PluginManager(metaclass=Singleton):
     '''
     Main plug-in management class.