python semaphores the sample program howeverstarts up five threadsthis therefore means that the first running threads will acquire the semaphore and the remaining thee will have to wait to acquire the semaphore once the first two release the semaphore further two can acquire it and so on from threading import threadsemaphorecurrentthread from time import sleep def worker(semaphore)with semaphoreprint(currentthread(getname(entered"sleep( print(currentthread(getname(exiting"print('mainthread starting'semaphore semaphore( for in range( )thread thread(name='tstr( )target=workerargs=[semaphore]thread start(print('mainthread done'the output from run of this program is given belowmainthread starting entered entered mainthread done exiting entered exiting entered exiting entered exiting exiting the concurrent queue class as might be expected the model where producer thread or process generates data to be processed by one or more consumer threads or processes is so common that higher level abstraction is provided in python than the use of locksconditions or semaphoresthis is the blocking queue model implemented by the threading queue or multiprocessing queue classes