code: def get_ao_chans(dev):
      
      buf = create_string_buffer(256)
      buflen = c_uint32(sizeof(buf))
      DAQmxGetDevAOPhysicalChans(dev.encode(), buf, buflen)
      pybuf = buf.value
      chans = pybuf.decode(u'utf-8').split(u",")
      return chans
docs: Discover and return a list of the names of all analog output channels for the given device
  
      :param dev: the device name
      :type dev: str