<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def show_message(self):
 """Show message updatable."""

        print(
            'current version: {current_version}\n'
            'latest version : {latest_version}'.format(
                current_version=self.current_version,
                latest_version=self.latest_version))