def connect(self): 
        try:
            self.connection = pymongo.Connection(self.host, self.port)
            self.db = self.connection[self.name]
        except AutoReconnect:
            raise DatabaseException("It's not possible connect to the database")
def on_upper_bound_checked_changed(self):
        if self.ui.checkBoxUpperBound.isChecked():
            self.ui.spinBoxUpperBound.setEnabled(True)
            self.ui.spinBoxBoundaryNumber.setEnabled(True)
        elif not self.ui.checkBoxLowerBound.isChecked():
            self.ui.spinBoxUpperBound.setEnabled(False)
            self.ui.spinBoxBoundaryNumber.setEnabled(False)
        else:
            self.ui.spinBoxUpperBound.setEnabled(False)