<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def reopen(self):
 """Reopen the pooled connection."""

        # If the connection is already back in the pool,
        # get another connection from the pool,
        # otherwise reopen the underlying connection.
        if self._con:
            self._con.reopen()
        else:
            self._con = self._pool.connection()