<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def unblockall(self):
        '''
        Remove all blocks from the queue and all sub-queues
        '''
        for q in self.queues.values():
            q.unblockall()
        self.blockEvents.clear()