mac下python安装scrapy报错解决方案

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distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse(‘incremental>=16.10.1’)

Command “python setup.py egg_info” failed with error code 1 in /private/tmp/pip-install-7e85mbu8/Twisted/

解决方案
输入命令

sudo pip install incremental==17.5.0

然后接可以安装scrapy了

sudo pip install -i https://pypi.douban.com/simple/ scrapy