bookmarks: use alternative method

vispa/remote/filesystem.py

@@ -615,7 +615,7 @@ class FileSystem(object):
             config.read(["/etc/vispa/workspace.ini",
                     self.expand("$HOME/.vispa/workspace.ini")])
             if not isinstance(request_dict, dict):
-                request_dict = {section:True for section in config.sections()}
+                request_dict = dict.fromkeys(config.sections(), True)
             data = {}
             for section, name_list in request_dict.iteritems():
                 if config.has_section(section):