def register_unpack_format(name, extensions, function, extra_args=None, description=''):
 if (extra_args is None):
  extra_args = []
 _check_unpack_options(extensions, function, extra_args)
 _UNPACK_FORMATS[name] = (extensions, function, extra_args, description)

def register_unpack_format ( name , extensions , function , extra_args = None , description = '' ) : if ( extra_args is None ) : extra_args = [ ] _check_unpack_options ( extensions , function , extra_args ) _UNPACK_FORMATS [ name ] = ( extensions , function , extra_args , description )
registers an unpack format .