a basic tree traversal of all devices

i have a basic script which i started; which traverses the dmd tree and then call a method device_info(d) to return all the attributes from the device (using http://fqdn:8080/zport/dmd/manage, clicking on Devices and then clicking on the "property" tab)

problem is when i iterate over the dmd.Devices the objects are strings; which then i cannot get any of the attributes.  i was assuming that dmd.Devices would return an object reference to some sub-class of DeviceClass.

question: once you get the list of devices as a string; how can you then use that string to get all its attributes?  also, is there a way to just simple get the DeviceClass objects directly?

def indent_spaces(level = 1):

        ret = ''

        indent = '   '

        for i in xrange(level):

                ret += indent

        return ret

def device_info(device, level = 1):

        ret = ""

        #add device description

        ret += indent_spaces(level)

        ret += 'description => '

        ret += device.description

        ret += "\n"

        #add device zPythonClass

        ret += indent_spaces(level)

        ret += 'pythonClass => '

        ret += device.zPythonClass

        ret += "\n"

        # add more attributes here

        return ret

  dmd = ZenScriptBase(connect=True).dmd

print '######################################'

print 'dmd.Devices'

print '######################################'

for d in dmd.Devices:

          print "device =>  %s " % d

          print device_info(d)

print ''

print ''

print '######################################'

print 'dmd.Devices.getSubDevices'

print '######################################'

for d in dmd.Devices.getSubDevices():

         print "device.subDevice => %s" % d

         print device_info(d)

print ''

print ''