python2.7 之centos7 安装 pip, Scrapy

一、确定python版本在2.7及以上

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!!

 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、确定安装了yum的epel最新库


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 gcc libffi-devel openssl-devel libxslt-devel libxml2-devel

五、安装pip与setuptools

#yum install python-pip -y
#pip install  setuptools
#pip install setuptools --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

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