Try to use nolock/readonly session

xbob/db/banca/create.py

@@ -181,7 +181,7 @@ def create(args):
 
   # the real work...
   create_tables(args)
-  s = session(args.type, args.files[0], echo=(args.verbose >= 2))
+  s = session_try_nolock(args.type, args.files[0], echo=(args.verbose >= 2))
   add_files(s, args.imagedir)
   add_subworlds(s)
   add_sessions(s)

xbob/db/banca/query.py

@@ -32,7 +32,7 @@ class Database(object):
       self.session = None
 
     else:
-      self.session = utils.session(INFO.type(), INFO.files()[0])
+      self.session = utils.session_try_readonly(INFO.type(), SQLITE_FILE)
 
   def is_valid(self):
     """Returns if a valid session has been opened for reading the database"""