Centos7 Scrapy 安装过程

沈阳格力专卖店

　　不多说，直接开整
　　一、安装开发包组、升级操作系统
#yum groupinstall "Development Tools" -y
#yum update -y　　注：
　　1、如果你的系统上的python不是python2.7以上版本请升级到python2.7以上版本（由于Scrapy 需要python 2.7 以上的版本）

#下载python2.7
#wget http://python.org/ftp/python/2.7.3/Python-2.7.3.tar.bz2
#解压
#tar -jxvf Python-2.7.3.tar.bz2  
#cd Python-2.7.3
#安装
#./configure
#make all           
#make install
#make clean
#make distclean
#查看python 版本
#/usr/local/bin/python2.7 -V  
#建立软连接，使系统默认的 python指向 python2.7
#mv /usr/bin/python /usr/bin/python2.6.6
#ln -s /usr/local/bin/python2.7 /usr/bin/python

#解决系统 Python 软链接指向 Python2.7 版本后，因为yum是不兼容 Python 2.7的，所以yum不能正常工作，我们需要指定 yum 的Python版本
vim /usr/bin/yum
将文件头部的
#!/usr/bin/python
改成
#!/usr/bin/python2.6.6　　2、强烈建议升级python2.7后再安装pip与setuptools,如果不这样操作会出现很多莫明的问题，让你酸爽到天明！！
　　3、如果你是升级到python2.7，更大的可能性是全部通过python setup.py 编译安装，所需要的包含但不限于这些包
lxml,zope.interface,Twisted,characteristic,pyasn1-modules,service-identity,Scrapy　　  PS:我一开始就是编译安装的，其中最多的问题是:
error:command 'gcc' failed with exit status 1　　    后来我发现，如果有这样的提示不是缺少devel包就是少某一个lib库文件;最令我哭笑不得是安装Scrapy 提示成功，但无法创建项目，测试样例都跑不了，最终我果断的换centos7了！
　　

　　###################以下内容都是Centos 7上的操作，升级到python2.7的同学请绕行##############
　　二、vim /etc/yum.repo/rpmforge.repo 指定rpmforge,来安装liffi-devel【如果不指定源，yum install liffi-devel会提示没有找到】
[rpmforge]
name = Red Hat Enterprise $releasever - RPMforge.net - dag
#baseurl = http://apt.sw.be/redhat/el5/en/$basearch/dag
mirrorlist = http://apt.sw.be/redhat/el7/en/mirrors-rpmforge
#mirrorlist = file:///etc/yum.repos.d/mirrors-rpmforge
enabled = 1
protect = 0
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rpmforge-dag
gpgcheck = 1#rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt
#yum install liffi-devel -y　　三、如果系统中安装有audit这个包请先移除，它会影响到Scrapy的安装
#yum remove audit　　四、安装Scarpy 所需要的开发包
#yum install -y python-devel openssl-devel libxslt-devel libxml2-devel　　五、安装pip与setuptools
#yum install python-pip -y
#pip install  setuptools
#pip install setuptoos --upgrade　　六、安装Scrapy
# pip install Scrapy
Collecting Scrapy
  Using cached Scrapy-1.0.3-py2-none-any.whl
Requirement already satisfied (use --upgrade to upgrade): cssselect>=0.9 in /usr/lib/python2.7/site-packages (from Scrapy)
Requirement already satisfied (use --upgrade to upgrade): queuelib in /usr/lib/python2.7/site-packages (from Scrapy)
Requirement already satisfied (use --upgrade to upgrade): pyOpenSSL in /usr/lib/python2.7/site-packages (from Scrapy)
Requirement already satisfied (use --upgrade to upgrade): w3lib>=1.8.0 in /usr/lib/python2.7/site-packages (from Scrapy)
Collecting lxml (from Scrapy)
  Using cached lxml-3.4.4.tar.gz
Collecting Twisted>=10.0.0 (from Scrapy)
  Using cached Twisted-15.4.0.tar.bz2
Requirement already satisfied (use --upgrade to upgrade): six>=1.5.2 in /usr/lib/python2.7/site-packages (from Scrapy)
Collecting service-identity (from Scrapy)
  Using cached service_identity-14.0.0-py2.py3-none-any.whl
Requirement already satisfied (use --upgrade to upgrade): cryptography>=0.7 in /usr/lib64/python2.7/site-packages (from pyOpenSSL->Scrapy)
Collecting zope.interface>=3.6.0 (from Twisted>=10.0.0->Scrapy)
  Using cached zope.interface-4.1.3.tar.gz
Collecting characteristic>=14.0.0 (from service-identity->Scrapy)
  Using cached characteristic-14.3.0-py2.py3-none-any.whl
Collecting pyasn1-modules (from service-identity->Scrapy)
  Using cached pyasn1_modules-0.0.8-py2.py3-none-any.whl
Requirement already satisfied (use --upgrade to upgrade): pyasn1 in /usr/lib/python2.7/site-packages (from service-identity->Scrapy)
Requirement already satisfied (use --upgrade to upgrade): idna>=2.0 in /usr/lib/python2.7/site-packages (from cryptography>=0.7->pyOpenSSL->Scrapy)
Requirement already satisfied (use --upgrade to upgrade): setuptools in /usr/lib/python2.7/site-packages (from cryptography>=0.7->pyOpenSSL->Scrapy)
Requirement already satisfied (use --upgrade to upgrade): enum34 in /usr/lib/python2.7/site-packages (from cryptography>=0.7->pyOpenSSL->Scrapy)
Requirement already satisfied (use --upgrade to upgrade): ipaddress in /usr/lib/python2.7/site-packages (from cryptography>=0.7->pyOpenSSL->Scrapy)
Requirement already satisfied (use --upgrade to upgrade): cffi>=1.1.0 in /usr/lib64/python2.7/site-packages (from cryptography>=0.7->pyOpenSSL->Scrapy)
Requirement already satisfied (use --upgrade to upgrade): pycparser in /usr/lib/python2.7/site-packages (from cffi>=1.1.0->cryptography>=0.7->pyOpenSSL->Scrapy)
Installing collected packages: lxml, zope.interface, Twisted, characteristic, pyasn1-modules, service-identity, Scrapy
  Running setup.py install for lxml
  Running setup.py install for zope.interface
  Running setup.py install for Twisted
Successfully installed Scrapy-1.0.3 Twisted-15.4.0 characteristic-14.3.0 lxml-3.4.4 pyasn1-modules-0.0.8 service-identity-14.0.0 zope.interface-4.1.3　　七、创建项目

[root@localhost workspace]# scrapy startproject tutorial
2015-10-15 21:54:24 [scrapy] INFO: Scrapy 1.0.3 started (bot: scrapybot)
2015-10-15 21:54:24 [scrapy] INFO: Optional features available: ssl, http11
2015-10-15 21:54:24 [scrapy] INFO: Overridden settings: {}
New Scrapy project 'tutorial' created in:
    /workspace/tutorial
You can start your first spider with:
    cd tutorial
    scrapy genspider example example.com　　八、目录结构
[root@localhost workspace]# tree
.
└── tutorial
    ├── scrapy.cfg
    └── tutorial
        ├── __init__.py
        ├── items.py
        ├── pipelines.py
        ├── settings.py
        └── spiders
            └── __init__.py
3 directories, 6 files　　九、Scrapy相关文档

• 　　http://www.tuicool.com/articles/URNVV3E 【编译安装Scrapy，但很不幸，我没成功】
  
• 　　https://scrapy-chs.readthedocs.org/zh_CN/0.24/intro/overview.html 【很早之前Scrapy中文翻译】
  
• 　　http://scrapy.org/
  
• 　　 http://doc.scrapy.org/en/master/
  

　　
　　十、总结

• 　　再次证明了度娘确实不好用；
  
• 　　一定要看官方的文档，搜索出来的不全面。这样可以少走很多弯路，减少不必要的工作量；
  
• 　　遇到的问题要先思考，冷静3s【也就一个Q[三重爪击]的时间】，再去搜索问题；
  
• 　　解决问题要形成文档，方便自己也方便别人。