python2 安装scrapy问题解决方法

错误代码：

    build/temp.linux-x86_64-2.7/_openssl.c:429:30: fatal error: openssl/opensslv.h: 没有那个文件或目录
    compilation terminated.
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
    
    ----------------------------------------
Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-AQ8e0t/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('
', '
'), __file__, 'exec'))" install --record /tmp/pip-2cxmRo-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-AQ8e0t/cryptography/

这个原因是库文件不全，安装

sudo apt-get install libssl-dev

即可