Simplify syntax

focker.py

@@ -37,7 +37,7 @@ class ListForwarderFunctor(object):
         res = []
         for elem in self.lst:
             res.append(elem(*args, **kwargs))
-        return res
+        return ListForwarder(res)
 
 
 class ListForwarder(object):
@@ -65,34 +65,28 @@ def create_parser():
     subparsers = ListForwarder([ subparsers_top.add_parser(cmd).add_subparsers(dest='L2_command') \
         for cmd in ['image', 'i'] ])
     subparsers.required = True
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['build', 'b']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['build', 'b']])
     parser.set_defaults(func=command_image_build)
     parser.add_argument('focker_dir', type=str)
     parser.add_argument('--tags', '-t', type=str, nargs='+', default=[])
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['tag', 't']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['tag', 't']])
     parser.set_defaults(func=command_image_tag)
     parser.add_argument('reference', type=str)
     parser.add_argument('tags', type=str, nargs='+')
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['untag', 'u']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['untag', 'u']])
     parser.set_defaults(func=command_image_untag)
     parser.add_argument('tags', type=str, nargs='+', default=[])
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['list', 'ls', 'l']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['list', 'ls', 'l']])
     parser.set_defaults(func=command_image_list)
     parser.add_argument('--full-sha256', '-f', action='store_true')
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['prune', 'p']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['prune', 'p']])
     parser.set_defaults(func=command_image_prune)
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['remove', 'r']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['remove', 'r']])
     parser.set_defaults(func=command_image_remove)
     parser.add_argument('reference', type=str)
     # parser.add_argument('--remove-children', '-r', action='store_true')
@@ -102,8 +96,7 @@ def create_parser():
     subparsers = ListForwarder([ subparsers_top.add_parser(cmd).add_subparsers(dest='L2_command') \
         for cmd in ['jail', 'j'] ])
     subparsers.required = True
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['create', 'c']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['create', 'c']])
     parser.set_defaults(func=command_jail_create)
     parser.add_argument('image', type=str)
     parser.add_argument('--command', '-c', type=str, default='/bin/sh')
@@ -112,53 +105,44 @@ def create_parser():
     parser.add_argument('--mounts', '-m', type=str, nargs='+', default=[])
     parser.add_argument('--hostname', '-n', type=str)
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['start', 's']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['start', 's']])
     parser.set_defaults(func=command_jail_start)
     parser.add_argument('reference', type=str)
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['stop', 'S']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['stop', 'S']])
     parser.set_defaults(func=command_jail_stop)
     parser.add_argument('reference', type=str)
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['remove', 'r']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['remove', 'r']])
     parser.set_defaults(func=command_jail_remove)
     parser.add_argument('reference', type=str)
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['exec', 'e']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['exec', 'e']])
     parser.set_defaults(func=command_jail_exec)
     parser.add_argument('reference', type=str)
     parser.add_argument('command', type=str, nargs=argparse.REMAINDER, default=['/bin/sh'])
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['oneshot', 'o']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['oneshot', 'o']])
     parser.set_defaults(func=command_jail_oneshot)
     parser.add_argument('image', type=str)
     parser.add_argument('--env', '-e', type=str, nargs='+', default=[])
     parser.add_argument('--mounts', '-m', type=str, nargs='+', default=[])
     parser.add_argument('command', type=str, nargs=argparse.REMAINDER, default=['/bin/sh'])
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['list', 'ls', 'l']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['list', 'ls', 'l']])
     parser.set_defaults(func=command_jail_list)
     parser.add_argument('--full-sha256', '-f', action='store_true')
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['tag', 't']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['tag', 't']])
     parser.set_defaults(func=command_jail_tag)
     parser.add_argument('reference', type=str)
     parser.add_argument('tags', type=str, nargs='+')
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['untag', 'u']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['untag', 'u']])
     parser.set_defaults(func=command_jail_untag)
     parser.add_argument('tags', type=str, nargs='+')
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['prune', 'p']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['prune', 'p']])
     parser.set_defaults(func=command_jail_prune)
     parser.add_argument('--force', '-f', action='store_true')
 
@@ -166,28 +150,23 @@ def create_parser():
     subparsers = ListForwarder([ subparsers_top.add_parser(cmd).add_subparsers(dest='L2_command') \
         for cmd in ['volume', 'v'] ])
     subparsers.required = True
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['create', 'c']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['create', 'c']])
     parser.set_defaults(func=command_volume_create)
     parser.add_argument('--tags', '-t', type=str, nargs='+', default=[])
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['prune', 'p']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['prune', 'p']])
     parser.set_defaults(func=command_volume_prune)
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['list', 'ls', 'l']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['list', 'ls', 'l']])
     parser.set_defaults(func=command_volume_list)
     parser.add_argument('--full-sha256', '-f', action='store_true')
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['tag', 't']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['tag', 't']])
     parser.set_defaults(func=command_volume_tag)
     parser.add_argument('reference', type=str)
     parser.add_argument('tags', type=str, nargs='+')
 
-    parser = ListForwarder(reduce(lambda a, b: a + b,
-        [subparsers.add_parser(cmd) for cmd in ['untag', 'u']]))
+    parser = ListForwarder([subparsers.add_parser(cmd) for cmd in ['untag', 'u']])
     parser.set_defaults(func=command_volume_untag)
     parser.add_argument('tags', type=str, nargs='+')