<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def status(self):
 """ Returns modified, added, removed, deleted files for current changeset """

        return self.repository._repo.status(self._ctx.p1().node(),
                                            self._ctx.node())