completion/query: add class attribute prototypes

Also, remove unused dbman attribute and add _ prefix to private
attribute keywords.

1 files changed, 8 insertions, 3 deletions

diff --git a/alot/completion/query.py b/alot/completion/query.py
index 42ea64a0..93d20527 100644
--- a/alot/completion/query.py
+++ b/alot/completion/query.py
@@ -13,17 +13,22 @@ from .namedquery import NamedQueryCompleter
 
 class QueryCompleter(Completer):
     """completion for a notmuch query string"""
+
+    _abookscompleter = None
+    _tagcompleter    = None
+    _nquerycompleter = None
+    _keywords        = None
+
     def __init__(self, dbman):
         """
         :param dbman: used to look up available tagstrings
         :type dbman: :class:`~alot.db.DBManager`
         """
-        self.dbman = dbman
         abooks = settings.get_addressbooks()
         self._abookscompleter = AbooksCompleter(abooks, addressesonly=True)
         self._tagcompleter = TagCompleter(dbman)
         self._nquerycompleter = NamedQueryCompleter(dbman)
-        self.keywords = ['tag', 'from', 'to', 'subject', 'attachment',
+        self._keywords = ['tag', 'from', 'to', 'subject', 'attachment',
                          'is', 'id', 'thread', 'folder', 'query']
 
     def complete(self, original, pos):
@@ -49,7 +54,7 @@ class QueryCompleter(Completer):
                 resultlist.append((newtext, newpos))
             return resultlist
         else:
-            matched = (t for t in self.keywords if t.startswith(myprefix))
+            matched = (t for t in self._keywords if t.startswith(myprefix))
             resultlist = []
             for keyword in matched:
                 newprefix = original[:start] + keyword + ':'