<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def setageing(self, time):
 """ Set bridge ageing time. """

        _runshell([brctlexe, 'setageing', self.name, str(time)],
            "Could not set ageing time in %s." % self.name)