How to use the pymtp.LIBMTP_Folder function in PyMTP

("storage_id", ctypes.c_uint32),
                            ("name", ctypes.c_char_p),
                            ("tracks", ctypes.POINTER(ctypes.c_uint32)),
                            ("no_tracks", ctypes.c_uint32),
                            ("next", ctypes.POINTER(LIBMTP_Playlist))]

class LIBMTP_Folder(ctypes.Structure):
	"""
		LIBMTP_Folder
		Contains the ctypes structure for LIBMTP_folder_t
	"""

	def __repr__(self):
		return "%s (%s)" % (self.name, self.folder_id)

LIBMTP_Folder._fields_ = [("folder_id", ctypes.c_uint32),
                          ("parent_id", ctypes.c_uint32),
                          ("storage_id", ctypes.c_uint32),
                          ("name", ctypes.c_char_p),
                          ("sibling", ctypes.POINTER(LIBMTP_Folder)),
                          ("child", ctypes.POINTER(LIBMTP_Folder))]

# Abstracted from libmtp 0.2.6.1's libmtp.h. This must be kept in sync.
LIBMTP_Filetype = {
	"WAV":			ctypes.c_int(0),
	"MP3":			ctypes.c_int(1),
	"WMA":			ctypes.c_int(2),
	"OGG":			ctypes.c_int(3),
	"AUDIBLE":		ctypes.c_int(4),
	"MP4":			ctypes.c_int(5),
	"UNDEF_AUDIO":		ctypes.c_int(6),	
	"WMV":			ctypes.c_int(7),

# ----------
 
_libmtp.LIBMTP_Get_Friendlyname.restype = ctypes.c_char_p
_libmtp.LIBMTP_Get_Serialnumber.restype = ctypes.c_char_p
_libmtp.LIBMTP_Get_Modelname.restype = ctypes.c_char_p
_libmtp.LIBMTP_Get_Manufacturername.restype = ctypes.c_char_p
_libmtp.LIBMTP_Get_Deviceversion.restype = ctypes.c_char_p
_libmtp.LIBMTP_Get_Filelisting_With_Callback.restype = ctypes.POINTER(LIBMTP_File)
_libmtp.LIBMTP_Get_Tracklisting_With_Callback.restype = ctypes.POINTER(LIBMTP_Track)
_libmtp.LIBMTP_Get_Filetype_Description.restype = ctypes.c_char_p
_libmtp.LIBMTP_Get_Filemetadata.restype = ctypes.POINTER(LIBMTP_File)
_libmtp.LIBMTP_Get_Trackmetadata.restype = ctypes.POINTER(LIBMTP_Track)
_libmtp.LIBMTP_Get_First_Device.restype = ctypes.POINTER(LIBMTP_MTPDevice)
_libmtp.LIBMTP_Get_Playlist_List.restype = ctypes.POINTER(LIBMTP_Playlist)
_libmtp.LIBMTP_Get_Playlist.restype = ctypes.POINTER(LIBMTP_Playlist)
_libmtp.LIBMTP_Get_Folder_List.restype = ctypes.POINTER(LIBMTP_Folder)
_libmtp.LIBMTP_Find_Folder.restype = ctypes.POINTER(LIBMTP_Folder)
_libmtp.LIBMTP_Get_Errorstack.restype = ctypes.POINTER(LIBMTP_Error)
# This is for callbacks with the type of LIBMTP_progressfunc_t
Progressfunc = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_uint64, ctypes.c_uint64)

# ----------
# End Type Definitions
# ----------

class MTP:
	"""
		The MTP object 
		This is the main wrapper around libmtp
	"""

	def __init__(self):