Linux安装scrapy出错Could not find a version that satisfies the requirement Twisted>=13.1.0

1错误原因，通过pip install 安装scrapy是报错Could not find a version that satisfies the requirement Twisted>=13.1.0 (from Scrapy) (from versions: ) 
No matching distribution found for Twisted>=13.1.0 (from Scrapy) 
原因是没有安装Twisted 
2.在这里需要安装twisted，可通过wget --no-check-certificate https://pypi.python.org/packages/source/T/Twisted/Twisted-15.2.1.tar.bz2 
获取，然后tar -xjvf Twisted-15.2.1.tar.bz2 进行解压 
注意在解压是可能会遇到tar (child): lbzip2: Cannot exec: No such file or directory 
tar (child): Error is not recoverable: exiting now 
tar: Child returned status 2 
tar: Error is not recoverable: exiting now的错误，这是因为你没有安装bzip2,通过 
yum -y install bzip2 命令安装一下就好了 
3.解压之后，cd Twisted-15.2.1到目录下，通过python setup.py install 指令进行安装，安装中报错Could not find suitable distribution for Requirement.parse('zope.interface>=4.0.2')，不用管直接下一步scrapy安装
4.最后直接进行pip install scrapy进行scrapy安装就行了
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原文：https://blog.csdn.net/liuzemeeting/article/details/79218734