最近在公司配置JCF的环境，碰到了一些杂七杂八的问题，所以在这里进行下总结。
【1】 Python的安装
在MAC下，python是默认安装好的，但根据说明，又重新下载了一份，进行了安装，导致系统中Python版本过多。如何删除过多的版本?
[A]
删除Python框架
sudo rm -rf /Library/Frameworks/Python.framework/Versions/x.x
删除Python程序
sudo rm -rf “/Applications/Python x.x”
删除/usr/local/bin目录下的Python连接
【2】安装python tool ，可以执行命令easy_install
Python Setup Tools http://pypi.python.org/pypi/setuptools
安装完成之后，
sudo easy_install scons 这个命令应该可以运行。
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【3】Scons
到官网下载Scons，解压，然后运行命令python setup.py install, 安装scons；
或者用：sudo easy_install scons 安装。
安装完成之后，scons命令可以运行；
[B]出现问题：
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/2.7/bin/scons", line 5, in <module>
pkg_resources.run_script('scons==2.2.0', 'scons')
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 489, in run_script
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 1207, in run_script
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scons-2.2.0-py2.7.egg/EGG-INFO/scripts/scons", line 188, in <module>
import SCons.Script
File "/Library/Frameworks/Python.framework/Versions/2.7/bin/scons", line 5, in <module>
pkg_resources.run_script('scons==2.2.0', 'scons')
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 489, in run_script
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 1207, in run_script
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scons-2.2.0-py2.7.egg/EGG-INFO/scripts/scons", line 188, in <module>
import SCons.Script
解决方式：export SCONS_DIR变量； 为能很好解决。查看路径设置。
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