我已經(jīng)安裝了aiohttp，但是import ayncio還是報(bào)錯(cuò)！~
環(huán)境變量也進(jìn)行了配置，有時(shí)候import asyncio成功，有時(shí)候又報(bào)錯(cuò)，想知道具體的原因~！

python:3.5.2
pip:9.0.1
windows:Win 7

報(bào)錯(cuò)代碼

Traceback (most recent call last):
  File "D:\Python\lib\asyncio\__init__.py", line 9, in <module>
    from . import selectors
ImportError: cannot import name 'selectors'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\Python\python learning\awesome-python3-weapp\app.py", line 4, in <module>
    import asyncio, os, json, time
  File "D:\Python\lib\asyncio\__init__.py", line 11, in <module>
    import selectors  # Will also be exported.
  File "D:\Python\lib\selectors.py", line 11, in <module>
    import select
  File "D:\Python\python learning\awesome-python3-weapp\select.py", line 3, in <module>
    @asyncio.coroutine
AttributeError: module 'asyncio' has no attribute 'coroutine'
[Finished in 0.2s with exit code 1]
[shell_cmd: python -u "D:\Python\python learning\awesome-python3-weapp\app.py"]
[dir: D:\Python\python learning\awesome-python3-weapp]
[path: C:\windows\System32;C:\Users\wb-lyn272693\AppData\Roaming\npm;D:\Python;D:\Python\Scripts;D:\Python\python learning\awesome-python3-weapp]