from multiprocessing.dummy import Pool as ThreadPool
import time
def fun(msg):
print('msg: ', msg)
time.sleep(1)
print('********')
return 'fun_return %s' % msg
if __name__ == '__main__':
'''
# map_async
print('\n------map_async-------')
arg = [1, 2, 10, 11, 18]
async_pool = ThreadPool(processes=4)
result = async_pool.map_async(fun, arg)
print(result.ready()) # 线程函数是否已经启动了
print('map_async: 不堵塞')
result.wait() # 等待所有线程函数执行完毕
print('after wait')
if result.ready(): # 线程函数是否已经启动了
if result.successful(): # 线程函数是否执行成功
print(result.get()) # 线程函数返回值
'''
'''
# map
print('\n------map-------')
arg = [3, 5, 11, 19, 12]
pool = ThreadPool(processes=3)
return_list = pool.map(fun, arg)
print('map: 堵塞')
pool.close()
pool.join()
print(return_list)
'''
'''
# apply_async
print('\n------apply_async-------')
async_pool = ThreadPool(processes=4)
results = []
for i in range(5):
msg = 'msg: %d' % i
result = async_pool.apply_async(fun, (msg,))
results.append(result)
print('apply_async: 不堵塞')
for i in results:
i.wait() # 等待线程函数执行完毕
for i in results:
if i.ready(): # 线程函数是否已经启动了
if i.successful(): # 线程函数是否执行成功
print(i.get()) # 线程函数返回值
'''
# apply
print('\n------apply-------')
pool = ThreadPool(processes=4)
results = []
for i in range(5):
msg = 'msg: %d' % i
result = pool.apply(fun, (msg,))
results.append(result)
print('apply: 堵塞')
pool.close()
pool.join()
print(results)
