#NEWLINE# def __init__( self , key , valid_keys ) : #NEWLINE# #INDENT# valid_keys = ', ' . join ( valid_keys ) #NEWLINE# full_message = ( "Unknown key '%s', valid choices are: %s" % ( key , valid_keys ) ) #NEWLINE# super ( ParamUnknownKeyError , self ) . __init__ ( full_message )