0. python -V               (此时显示为2.6.6)

1. yum -y update 

2. yum groupinstall -y development 

3. yum install -y zlib-dev openssl-devel sqlite-devel bzip2-devel 

4. wget http://www.python.org/ftp/python/2.7.6/Python-2.7.6.tar.xz 

5. tar -xvf Python-2.7.6.tar.xz 

6. cd Python-2.7.6 

7. ./configure 

8. make && make altinstall 

9. mv /usr/bin/python /usr/bin/python2.6.6 

10. ln -s /usr/local/bin/python2.7 /usr/bin/python 

11. vi /usr/bin/yum(#!/usr/bin/python 改为 #!/usr/bin/python2.6.6) 

12. wget --no-check-certificate https://pypi.python.org/packages/source/s/setuptools/setuptools-1.4.2.tar.gz 

13. tar -xvf setuptools-1.4.2.tar.gz 

14. cd setuptools-1.4.2 

15. python setup.py install 

16. ln -s /usr/local/bin/easy_install-2.7 /usr/bin/easy_install 

17. easy_install pip 

18. curl https://raw.github.com/pypa/pip/master/contrib/get-pip.py | python2.7 

19. yum -y install libxslt-devel 

20. yum -y install libffi-devel 

21. pip install scrapy 

Successfully installed scrapy Twisted w3lib queuelib lxml pyOpenSSL cssselect six

scrapy -h