scrapy startproject test 创建scrapy项目的时候报错

[PYr_Lee]

系统：Ubuntu 16.4
python3.6
在虚拟环境下 安装了 twisted-15.2.1
Scrapy 1.5.0 也安装好了

创建Scrapy的时候提示一下信息：

(pyvirSpider) root@ubuntu:/myScrapy# scrapy startproject test
Traceback (most recent call last):
File "/myPyVirtualenv/pyvirSpider/bin/scrapy", line 7, in <module>
from scrapy.cmdline import execute
File "/myPyVirtualenv/pyvirSpider/lib/python3.6/site-packages/scrapy/__init__.py", line 27, in <module>
from . import _monkeypatches
File "/myPyVirtualenv/pyvirSpider/lib/python3.6/site-packages/scrapy/_monkeypatches.py", line 20, in <module>
import twisted.persisted.styles # NOQA
ModuleNotFoundError: No module named 'twisted.persisted'