How to use the pymtp.LIBMTP_Error function in PyMTP

# ----------
# Data Model Definitions
# ----------

class LIBMTP_Error(ctypes.Structure):
	"""
		LIBMTP_Error
		Contains the ctypes structure for LIBMTP_error_t
	"""

	def __repr__(self):
		return self.errornumber

LIBMTP_Error._fields_ = [("errornumber", ctypes.c_int),
                         ("error_text", ctypes.c_char_p),
                         ("next", ctypes.POINTER(LIBMTP_Error))]

class LIBMTP_DeviceStorage(ctypes.Structure):
	"""
		LIBMTP_DeviceStorage
		Contains the ctypes structure for LIBMTP_devicestorage_t
	"""

	def __repr__(self):
		return self.id

LIBMTP_DeviceStorage._fields_ = [("id", ctypes.c_uint32),
                                 ("StorageType", ctypes.c_uint16),
                                 ("FilesystemType", ctypes.c_uint16),
                                 ("AccessCapability", ctypes.c_uint16),
                                 ("MaxCapacity", ctypes.c_uint64),
                                 ("FreeSpaceInBytes", ctypes.c_uint64),

# ----------

# ----------
# Data Model Definitions
# ----------

class LIBMTP_Error(ctypes.Structure):
	"""
		LIBMTP_Error
		Contains the ctypes structure for LIBMTP_error_t
	"""

	def __repr__(self):
		return self.errornumber

LIBMTP_Error._fields_ = [("errornumber", ctypes.c_int),
                         ("error_text", ctypes.c_char_p),
                         ("next", ctypes.POINTER(LIBMTP_Error))]

class LIBMTP_DeviceStorage(ctypes.Structure):
	"""
		LIBMTP_DeviceStorage
		Contains the ctypes structure for LIBMTP_devicestorage_t
	"""

	def __repr__(self):
		return self.id

LIBMTP_DeviceStorage._fields_ = [("id", ctypes.c_uint32),
                                 ("StorageType", ctypes.c_uint16),
                                 ("FilesystemType", ctypes.c_uint16),
                                 ("AccessCapability", ctypes.c_uint16),