'Import data in current namespace'

def import_data(self, fname):

    if self.count():
        nsb = self.current_widget()
        nsb.refresh_table()
        nsb.import_data(filenames=fname)
        if (self.dockwidget and (not self.ismaximized)):
            self.dockwidget.setVisible(True)
            self.dockwidget.raise_()
