1.环境

        本文介绍了在Centos系统下安装Scrapy，因Scrapy是Python针对爬虫开发的框架，所以在安装前因先安装Python，Centos下安装Python3.6.2，按照https://mp.csdn.net/postedit/80076166即可。

2.安装Scrapy

#yum -y update  //更新yum

#yum install gcc libffi-devel python-devel openssl-devel  //安装gcc及扩展包

#yum groupinstall -y development  //安装开发工具包

#yum install libxslt-devel  //安装libxslt-devel支持xml

#yum -y install python-pip  //安装pip （pip是一个Python包管理工具，主要是用于安装PyPI上的软件包，可以替代easy-install工具）

No package python-pip available该操作对于最小系统版，有可能出现如下错误：

    No package python-pip available. Error: Nothing to do

解决办法：

#yun -y install epe;-release

再执行

#yum -y install python-pip

安装完成后清理

#yum clean all

#pip install scrapy  //安装Scrapy

3.检查Scrapy安装结果

#scrapy

Scrapy 1.5.0 - no active project

Usage:
  scrapy <command> [options] [args]

Available commands:
  bench         Run quick benchmark test
  fetch         Fetch a URL using the Scrapy downloader
  genspider     Generate new spider using pre-defined templates
  runspider     Run a self-contained spider (without creating a project)
  settings      Get settings values
  shell         Interactive scraping console
  startproject  Create new project
  version       Print Scrapy version
  view          Open URL in browser, as seen by Scrapy

  [ more ]      More commands available when run from project directory

Use "scrapy <command> -h" to see more info about a command

则表示安装scrapy1.5.0成功。