diff --git a/swh/loader/git/loader.py b/swh/loader/git/loader.py
index 5578ae7..defe4ec 100644
--- a/swh/loader/git/loader.py
+++ b/swh/loader/git/loader.py
@@ -1,53 +1,57 @@
 # Copyright (C) 2015  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import logging
 import os
 
 from swh.loader.git import git, remote_store, local_store
 
 
-_load_to_back_fn = {'remote': remote_store.load_to_back
-                   ,'local': local_store.prepare_and_load_to_back
-                   }
+_load_to_back = {
+    'remote': remote_store.load_to_back,
+    'local': local_store.prepare_and_load_to_back,
+}
 
 
 def check_user_conf(conf):
     """Check the user's configuration and rejects if problems.
     """
     action = conf['action']
     if action != 'load':
         return 'skip unknown action %s' % action
 
     backend_type = conf['backend-type']
-    if backend_type not in _load_to_back_fn:
-        return 'skip unknown backend-type %s (only `remote`, `local` supported)' % backend_type
+    if backend_type not in _load_to_back:
+        return ('skip unknown backend-type %s (only '
+                '`remote`, `local` supported)' % backend_type)
 
     repo_path = conf['repo_path']
     if not os.path.exists(repo_path):
         return 'Repository %s does not exist.' % repo_path
 
     return None
 
 
 def load(conf):
     """According to action, load the repo_path.
 
     used configuration keys:
     - action: requested action
     - repo_path: git repository path ('load' action only)
     - backend-type: backend access's type (remote or local)
     - backend: url access to backend api
     """
     error_msg = check_user_conf(conf)
     if error_msg:
         logging.error(error_msg)
         raise Exception(error_msg)
 
     repo_path = conf['repo_path']
     logging.info('load repo_path %s' % repo_path)
 
     swhrepo = git.parse(repo_path)
-    _load_to_back_fn[conf['backend-type']](conf['backend'], swhrepo)
+    loader = _load_to_back[conf['backend-type']]
+
+    loader(conf['backend'], swhrepo)