池模块 -进程池 -线程池

池模块

线程池concurrent.futures.ThreadPoolExecutor

	from concurrent.futures import ThreadPoolExecutor
	from time import sleep
	
	tpool = ThreadPoolExecutor(max_workers=5)	#设置线程最大数量
	
	def func(i):
	    sleep(1)
	    print(i)
	
	for i in range(20):
	    tpool.submit(func, i)
	tpool.shutdown()    #等待所有子线程运行结束
	print('主线程在这里')

• t.result() 获取函数的返回值

进程池concurrent.futures.ProcessPoolExecutor

from concurrent.futures import ProcessPoolExecutor
		from time import sleep
		tpool = ProcessPoolExecutor(max_workers=5)	#这是最大进程数
		
		def func(i):
		    sleep(1)
		    print(i)
		
		for i in range(20):
		    tpool.submit(func, i)
		tpool.shutdown()    #等待所有子进程运行结束
		print('主线程在这里')
- `t.result()	`	获取函数的返回值