python路径拼接函数，解决windows和linux文件分隔符不同

python 路径字符串拼接os.path.join

输入：print 'cur dir:' + os.path.join("software","Anaconda","python.exe")

输出：cur dir:software\Anaconda\python.exe

输入：CPPPATH = [os.path.join("software","Anaconda","python.exe")]

           print CPPPATH

输出：['software\\Anaconda\\python.exe']