cosmetic changes

feed

@@ -149,32 +149,50 @@ def get_duration(url):
     return int(float(value))
 
 
+HELP = '''
+Collect audio informations from multiple sources (XML feeds).
+Audios are (in that order):
+ 1. Collected from feeds; (grouped by article if --group is used)
+ 2. Filtered; everything that does not match with requirements is excluded
+ 3. Sorted; even randomly
+ 4. Sliced; take HOWMANY elements, skipping START elements
+ 5. (if --copy) Copied
+Usage: '''
+
+
 def get_parser():
-    p = ArgumentParser('Get music from a (well-specified) xml feed')
+    p = ArgumentParser(HELP)
     src = p.add_argument_group('sources', 'How to deal with sources')
     src.add_argument('--source-weights',
                      help='Select only one "source" based on this weights')
+    src.add_argument('--group', default=False, action='store_true',
+                     help='Group audios that belong to the same article')
 
-    filters = p.add_argument_group('filters', 'Select only items that match these conditions')
+    filters = p.add_argument_group('filters', 'Select only items that match '
+                                   'these conditions')
     filters.add_argument('--max-len', default=0, type=int,
-                         help='Exclude any audio that is longer than MAXLEN seconds')
+                         help='Exclude any audio that is longer '
+                         'than MAX_LEN seconds')
     filters.add_argument('--random', default=False,
                          action='store_true', help='Pick randomly')
     filters.add_argument('--min-len', default=0, type=int,
-                         help='Exclude any audio that is shorter than MIN_LEN seconds')
+                         help='Exclude any audio that is shorter '
+                         'than MIN_LEN seconds')
+
     p.add_argument('--start', default=0, type=int,
                    help='0-indexed start number. '
                    'By default, play from most recent')
-
     p.add_argument('--howmany', default=1, type=int,
                    help='If not specified, only 1 will be played')
-    p.add_argument('--slotsize', help='Seconds between each audio', type=int)
-    p.add_argument('--group', help='Group articles', default=False,
-                   action='store_true')
-    p.add_argument('--copy', help='Copy files to $TMPDIR', default=False,
-                   action='store_true')
-    p.add_argument('--debug', help='Debug messages', default=False,
-                   action='store_true')
+    p.add_argument('--slotsize', type=int,
+                   help='Seconds between each audio. Still unsupported')
+
+    general = p.add_argument_group('general', 'General options')
+    general.add_argument('--copy', help='Copy files to $TMPDIR', default=False,
+                         action='store_true')
+    general.add_argument('--debug', help='Debug messages', default=False,
+                         action='store_true')
+
     p.add_argument('urls', metavar='URL', nargs='+')
     return p
 
@@ -225,8 +243,10 @@ def main():
             if not args.group:
                 # get audio urls, removing those that are too long
                 audios += [audio for audio in get_urls(tree) if
-                           (args.max_len == 0 or audio.duration <= args.max_len) and
-                           (args.min_len == 0 or audio.duration >= args.min_len)
+                           (args.max_len == 0 or
+                            audio.duration <= args.max_len) and
+                           (args.min_len == 0 or
+                            audio.duration >= args.min_len)
                            ]
             else:
                 groups = get_grouped_urls(tree)