ImportError: No module named persisted.styles 问题解决

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参考文档：
http://stackoverflow.com/questions/6504810/how-to-install-lxml-on-ubuntu

好长时间没在本机跑爬虫，今日一跑居然报错

Traceback (most recent call last):  File "/home/yuzx/data/git_st/ad-crawler/adimage_crawler/adimage_crawler/spiders/lady8844_star.py", line 2, in <module>    import scrapy  File "/usr/local/lib/python2.7/dist-packages/scrapy/__init__.py", line 27, in <module>    from . import _monkeypatches  File "/usr/local/lib/python2.7/dist-packages/scrapy/_monkeypatches.py", line 20, in <module>    import twisted.persisted.styles  # NOQAImportError: No module named persisted.styles

尝试升级以下 scrapy

pip2 install --user scrapy --upgrade

在编译时报错：

src/lxml/includes/etree_defs.h:14:31: fatal error: libxml/xmlversion.h: 没有那个文件或目录

安装依赖

sudo apt-get -y install libxml2-dev libxslt1-dev

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