从期货ASYNCIO

Question

我疑惑得到以下与ASYNCIO工作：

下面的代码片段被查询多个设备（通过SNMP），并返回一个字典，它工作正常，但由multiprocessing.cpu_count()

限制

def do_polling(netelement, snmp_comm): 
    msg = {} 
    msg.update({ 
     'bgp'  : do_lookup_bgp(netelement, snmp_comm), 
     'iface'  : do_lookup_iface(netelement, snmp_comm), 
     'ifidx'  : do_lookup_ifindex(netelement, snmp_comm), 
     'agg'  : do_lookup_agg(netelement, snmp_comm), 
    }) 
    return msg 

def save(netelement, job): 
    data[netelement] = job.result() 

with concurrent.futures.ProcessPoolExecutor(max_workers=multiprocessing.cpu_count()) as executor: 
    for k,v in INFO['dev'].items(): 
     job = executor.submit(do_polling, k, v['snmp_comm']) 
     job.add_done_callback(functools.partial(save, k)) 

，所以我想通过改变这样的迁移到asyncio方法：

@asyncio.coroutine 
def do_polling(netelement, snmp_comm): 
    msg = {} 
    msg['bgp']  = yield from do_lookup_bgp(netelement, snmp_comm) 
    msg['iface'] = yield from do_lookup_iface(netelement, snmp_comm) 
    msg['ifidx'] = yield from do_lookup_ifindex(netelement, snmp_comm) 
    msg['agg']  = yield from do_lookup_agg(netelement, snmp_comm) 

@asyncio.coroutine 
def schedule(INFO): 
    for k,v in INFO['dev'].items(): 
     asyncio.async(do_polling(k, v)) 

asyncio.get_event_loop().run_until_complete(schedule) 

但我得到以下埃罗r：

Traceback (most recent call last): 
    File "/home/app/ip-spotlight/code/ixmac.py", line 60, in <module> 
    main() 
    File "/home/app/ip-spotlight/code/ixmac.py", line 16, in main 
    app.ixmac.initialize.run(INFO) 
    File "/home/app/ip-spotlight/code/app/ixmac/initialize.py", line 191, in run 
    asyncio.get_event_loop().run_until_complete(schedule) 
    File "/usr/lib64/python3.4/asyncio/base_events.py", line 353, in run_until_complete 
    future = tasks.ensure_future(future, loop=self) 
    File "/usr/lib64/python3.4/asyncio/tasks.py", line 553, in ensure_future 
    raise TypeError('A Future, a coroutine or an awaitable is required') 
TypeError: A Future, a coroutine or an awaitable is required 

你能否告诉我我做错了什么？

Answer 1

您并未将其用作协同程序。你应该改变最后一行：

asyncio.get_event_loop().run_until_complete(schedule(the_info_variable))