在安装scrapy之前首先得确保你已经安装了python 以及pip
1，安装scrapy
pip install scrapy
如果报错：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，安装Twisted。
wget https://pypi.python.org/packages/source/T/Twisted/Twisted-15.2.1.tar.bz2 --no-check-certificate tar -xjvf Twisted-15.2.1.tar.bz2 cd Twisted-15.2.1 python setup.py install
成功。
参考链接：http://blog.csdn.net/snowpay/article/details/64919647
原文：http://www.cnblogs.com/fh-fendou/p/7808166.html