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']
