安装下载Centos下安装Scrapy 安装下载

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　　最近用使开发的过程中出现了一个小问题，顺便记录一下原因和方法--安装下载
　　Scrapy是一个开源的遇机twisted框架的python的单机爬虫，该爬虫实际上包括大多数网页抓取的工具包，用于爬虫下载端以及取抽端。
　　安装环境:
　　

centos5.4
python2.7.3

　　
　　安装步调:
　　1.下载python2.7  http://www.python.org/ftp/python/2.7.3/Python-2.7.3.tgz

[iyunv@zxy-websgs ~]# wget http://www.python.org/ftp/python/2.7.3/Python-2.7.3.tgz -P /opt

[iyunv@zxy-websgs opt]# tar xvf Python-2.7.3.tgz
[iyunv@zxy-websgs Python-2.7.3]# ./configure
[iyunv@zxy-websgs Python-2.7.3]# make && make install

　　 验证python2.7安装

[iyunv@zxy-websgs Python-2.7.3]# python2.7
Python 2.7.3 (default, Feb 28 2013, 03:08:43)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-50)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()

　　2.安装setuptools,http://pypi.python.org/packages/source/s/setuptools/setuptools-0.6c11.tar.gz

[iyunv@zxy-websgs ~]# wget http://pypi.python.org/packages/source/s/setuptools/setuptools-0.6c11.tar.gz -P /opt/
[iyunv@zxy-websgs opt]# tar zxvf setuptools-0.6c11.tar.gz
[iyunv@zxy-websgs setuptools-0.6c11]# python2.7 setup.py  install

　　 
　　3.安装Twisted

[iyunv@zxy-websgs setuptools-0.6c11]# easy_install Twisted
......
Installed /usr/local/lib/python2.7/site-packages/Twisted-12.3.0-py2.7-linux-x86_64.egg
......
Installed /usr/local/lib/python2.7/site-packages/zope.interface-4.0.4-py2.7-linux-x86_64.egg

　　Twisted要安装zope.interface,可以从面下地址下载
　　zope.interface:http://pypi.python.org/packages/source/z/zope.interface/zope.interface-4.0.1.tar.gz
　　twisted:http://twistedmatrix.com/Releases/Twisted/12.1/Twisted-12.1.0.tar.bz2
　　5.安装w3lib

[iyunv@zxy-websgs setuptools-0.6c11]# easy_install -U w3lib
Searching for w3lib
Reading http://pypi.python.org/simple/w3lib/
Reading http://github.com/scrapy/w3lib
Best match: w3lib 1.2
Downloading http://pypi.python.org/packages/source/w/w3lib/w3lib-1.2.tar.gz#md5=f929d5973a9fda59587b09a72f185a9e
Processing w3lib-1.2.tar.gz
Running w3lib-1.2/setup.py -q bdist_egg --dist-dir /tmp/easy_install-wm_1BB/w3lib-1.2/egg-dist-tmp-2DQHY_
zip_safe flag not set; analyzing archive contents...
Adding w3lib 1.2 to easy-install.pth file
Installed /usr/local/lib/python2.7/site-packages/w3lib-1.2-py2.7.egg
Processing dependencies for w3lib
Finished processing dependencies for w3lib

　　w3lib:http://pypi.python.org/packages/source/w/w3lib/w3lib-1.2.tar.gz
　　6.安装libxml2或者用easy_install安装lxml

[iyunv@zxy-websgs lxml-3.1.0]# easy_install lxml

　　验证lxml安装

[iyunv@zxy-websgs lxml-3.1.0]# python2.7
Python 2.7.3 (default, Feb 28 2013, 03:08:43)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-50)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import lxml
>>> exit()

　　也可以安装libxml2,官网上荐推安装2.6.28或者以上的本版，但在官网上没找到，我先是安装的2.6.9的本版，行运scrapy时报以下错误

Traceback (most recent call last):
File "/usr/local/bin/scrapy", line 5, in <module>
pkg_resources.run_script('Scrapy==0.14.4', 'scrapy')
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 489, in run_script
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 1207, in run_script
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/EGG-INFO/scripts/scrapy", line 4, in <module>
execute()
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/cmdline.py", line 112, in execute
cmds = _get_commands_dict(inproject)
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/cmdline.py", line 37, in _get_commands_dict
cmds = _get_commands_from_module('scrapy.commands', inproject)
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/cmdline.py", line 30, in _get_commands_from_module
for cmd in _iter_command_classes(module):
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/cmdline.py", line 21, in _iter_command_classes
for module in walk_modules(module_name):
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/utils/misc.py", line 65, in walk_modules
submod = __import__(fullpath, {}, {}, [''])
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/commands/shell.py", line 8, in <module>
from scrapy.shell import Shell
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/shell.py", line 14, in <module>
from scrapy.selector import XPathSelector, XmlXPathSelector, HtmlXPathSelector
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/selector/__init__.py", line 30, in <module>
from scrapy.selector.libxml2sel import *
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/selector/libxml2sel.py", line 12, in <module>
from .factories import xmlDoc_from_html, xmlDoc_from_xml
File "/usr/local/lib/python2.7/site-packages/Scrapy-0.14.4-py2.7.egg/scrapy/selector/factories.py", line 14, in <module>
libxml2.HTML_PARSE_NOERROR + \
AttributeError: 'module' object has no attribute 'HTML_PARSE_RECOVER'

　　升级到2.6.21本版当前决解了。
　　libxml2.6.1:ftp://xmlsoft.org/libxml2/python/libxml2-python-2.6.21.tar.gz
　　7.安装pyOpenSSL(这个是可选安装的，重要为了使scrapy够能持支https)
　　用easy_install pyOpenSSL安装的是pyOpenSSL-0.13本版，没安装功成，于是手动下载.011本版来停止安装。

[iyunv@zxy-websgs opt]# wget http://launchpadlibrarian.net/58498441/pyOpenSSL-0.11.tar.gz -P /opt
[iyunv@zxy-websgs opt]# tar zxvf pyOpenSSL-0.11.tar.gz
[iyunv@zxy-websgs pyOpenSSL-0.11]# python2.7 setup.py install

　　pyOpenSSL:http://launchpadlibrarian.net/58498441/pyOpenSSL-0.11.tar.gz
　　8.安装scrapy

[iyunv@zxy-websgs pyOpenSSL-0.11]# easy_install -U Scrapy

　　验证安装

[iyunv@zxy-websgs pyOpenSSL-0.11]# scrapy
Scrapy 0.16.4 - no active project
Usage:
scrapy <command> [options] [args]
Available commands:
fetch         Fetch a URL using the Scrapy downloader
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

　　scrapy:http://pypi.python.org/packages/source/S/Scrapy/Scrapy-0.14.4.tar.gz
　　结总：
　　pyOpenSSL独自安装的时候不功成，也可以先下载pyOpenSSL0.11停止安装，再用使easy_install -U Scrapy停止全程安装
　　文章结束给大家分享下程序员的一些笑话语录： 火车
一个年轻的程序员和一个项目经理登上了一列在山里行驶的火车，他们发现 列车上几乎都坐满了，只有两个在一起的空位，这个空位的对面是一个老奶 奶和一个年轻漂亮的姑娘。两个上前坐了下来。程序员和那个姑娘他们比较 暧昧地相互看对方。这时，火车进入山洞，车厢里一片漆黑。此时，只听见 一个亲嘴的声音，随后就听到一个响亮的巴掌声。很快火车出了山洞，他们 四个人都不说话。
那个老奶奶在喃喃道， “这个年轻小伙怎么这么无礼， 不过我很高兴我的孙女 扇了一个巴掌”。
项目经理在想，“没想到这个程序员居然这么大胆，敢去亲那姑娘，只可惜那 姑娘打错了人，居然给打了我。”
漂亮的姑娘想，“他亲了我真好，希望我的祖母没有打疼他”。
程序员坐在那里露出了笑容， “生活真好啊。 这一辈子能有几次机会可以在亲 一个美女的同时打项目经理一巴掌啊”