python asyncio coroutine协程的并发 task(并行编程 28)

import asyncio
@asyncio.coroutine
def fa(num):
f=1
for i in range(2,num+1):
print("Asyncio.Task:Computer factories({})".format(i))
yield from asyncio.sleep(1)
f=i
print("Asyncio.Task - factorial({}) ={}".format(num,f))
@asyncio.coroutine
def fi(num):
a,b=0,1
for i in range(2, num + 1):
print("Asyncio.Task:Computer fibonacci({})".format(i))
yield from asyncio.sleep(1)
a,b=b,a+b
print("Asyncio.Task - fibonacci({}) ={}".format(num, a))
@asyncio.coroutine
def bi(n,k):
result=1
for i in range(1,k+1):
result=result(n-i+1)/i
print("Asyncio.Task:Computer binomialcoeff({})".format(i))
yield from asyncio.sleep(1)
print("Asyncio.Task - binomialcoeff({},{}) ={}".format(n,k,result))
if name=="main":
tasks=[asyncio.Task(fa(10)),asyncio.Task(fi(10)),asyncio.Task(bi(20,10))]
loop=asyncio.get_event_loop()
loop.run_until_complete(asyncio.wait(tasks))
loop.close()

asyncio.Task()

loop.run_until_complete(asyncio.wait(tasks))