if session is not None:
from Screens.NumericalTextInputHelpDialog import NumericalTextInputHelpDialog
self.help_window = session.instantiateDialog(NumericalTextInputHelpDialog, self)
if session is not None:
from Screens.NumericalTextInputHelpDialog import NumericalTextInputHelpDialog
self.help_window = session.instantiateDialog(NumericalTextInputHelpDialog, self)