-from PyQt4.QtCore import Qt, QString
-from PyQt4.QtGui import QWidget, QLabel, QTreeView, QStandardItemModel, QVBoxLayout
+from PyQt4.QtCore import Qt, QString, SIGNAL
+from PyQt4.QtGui import QWidget, QLabel, QTreeView, QStandardItemModel, QVBoxLayout, QSizePolicy
+
+from sfa.util.rspecHelper import RSpec