CentOS7在python3的基础上安装scrapy

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安装python3centos7安装python3的步骤

需要做pip3和python3的软连接，这样python3和pip3就都能用了

ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

直接执行

pip3 install scrapy

可能会报下面的错误

 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)

需要安装Twisted>=13.1.0

# virtualenv --python=python3.6 ENV
# source ENV/bin/activate
wget https://twistedmatrix.com/Releases/Twisted/17.1/Twisted-17.1.0.tar.bz2
tar -jxvf Twisted-17.1.0.tar.bz2
cd Twisted-17.1.0
python3 setup.py install
cd ..

按步骤或者一次性卸载脚本里

然后再继续执行

pip3 install scrapy