<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def close(self):
 """Close file, see file.close"""

        try:
            self.parent_fd.fileno()
        except io.UnsupportedOperation:
            logger.debug("Not closing parent_fd - reusing existing")
        else:
            self.parent_fd.close()