#NEWLINE# @ methodtrace ( _logger ) #NEWLINE# def __init__( self , lib ) : #NEWLINE# #INDENT# usb . backend . IBackend . __init__ ( self ) #NEWLINE# self . lib = lib #NEWLINE# self . ctx = c_void_p ( ) #NEWLINE# _check ( self . lib . libusb_init ( byref ( self . ctx ) ) )