Centos6.5x64 安裝scrapy1.0.4成功

最近在自學(xué)爬蟲框架scrapy，看了看官網(wǎng)文檔，迫不及待動(dòng)手安裝。結(jié)果錯(cuò)誤百出，慘不忍睹。網(wǎng)上搜了一篇文章，（原文鏈接 http://www.tuicool.com/articles/URNVV3E）。

首先，介紹下環(huán)境：

1、Centos6.5 x64 安裝在VMware虛擬機(jī)中，因?yàn)楹笃谛枰浦?，遂選擇了兼容vm10.0。

# yum -y update

升級(jí)下系統(tǒng)

2、Python2.7.9。系統(tǒng)自帶為2.6.6。

cd ~/Download

管網(wǎng)下載源碼：

wget --no-check-certificate https://www.python.org/ftp/python/2.7.9/Python-2.7.9.tar.xz

tar xvf Python-2.7.9.tar.xz

cd Python-2.7.9

./configure --with-ensurepip=install   #其余保持默認(rèn)

make

sudo make install  # 如果python2.7.9做副版本的話使用make altinstall

[Mikky@localhost Python-2.7.9]$ python
Python 2.7.9 (default, Feb  1 2016, 21:30:54)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>

升級(jí)了下libffi-devel因?yàn)椴人犹?，所以直接又更新了下，此步選做：

sudo yum install update libffi-devel

至此環(huán)境準(zhǔn)備妥當(dāng)，下面就是踩坑環(huán)節(jié)o(╯□╰)o

安裝失敗方法：

sudo /usr/local/bin/pip install scrapy

錯(cuò)誤很多，參考文首的鏈接依然無法解決?？泳筒毁N出來了，慢慢踩吧。

那么多坑的主要原因在于pip安裝軟件的依賴庫問題，尤其是：cryptography。

pip默認(rèn)安裝最新的而不是最穩(wěn)定的版本，安裝的cryptography為最新版（1.2.2    我的安裝時(shí)間為2016年2月初），因此：

sudo /usr/local/bin/pip install cryptography==0.9

........無視warn

Successfully installed cryptography idna pyasn1 six enum34 ipaddress cffi pycparser
Cleaning up...

到這大功告成一大半了，接下來請(qǐng)主角出場(chǎng)：

sudo /usr/local/bin/pip install scrapy
.........

Successfully installed scrapy pyOpenSSL queuelib service-identity lxml w3lib cssselect Twisted pyasn1-modules characteristic zope.interface
Cleaning up...

[Mikky@localhost ~]$ scrapy version
/usr/local/lib/python2.7/site-packages/cffi/model.py:526: UserWarning: 'point_conversion_form_t' has no values explicitly defined; next version will refuse to guess which integer type it is meant to be (unsigned/signed, int/long)
  % self._get_c_name())
Scrapy 1.0.4
繼續(xù)無視警告，已經(jīng)被這些警告整瘋了。

$  scrapy startproject tutorial
/usr/local/lib/python2.7/site-packages/cffi/model.py:526: UserWarning: 'point_conversion_form_t' has no values explicitly defined; next version will refuse to guess which integer type it is meant to be (unsigned/signed, int/long)
  % self._get_c_name())
New Scrapy project 'tutorial' created in:
    /home/Mikky/scrapy/tutorial

You can start your first spider with:
    cd tutorial
    scrapy genspider example example.com
[Mikky@localhost scrapy]$ ll
total 4
drwxrwxr-x. 3 Mikky Mikky 4096 Feb  3 22:27 tutorial

安裝完成，關(guān)于這個(gè)warning，參見https://bitbucket.org/cffi/cffi/issues/234/cffi-131-userwarning-about  。