#NEWLINE# def __setitem__( self , key , value ) : #NEWLINE# #INDENT# try : #NEWLINE# #INDENT# ( dialect , value_key ) = self . _key ( self ) #NEWLINE# #UNINDENT# except KeyError : #NEWLINE# #INDENT# raise exc . ArgumentError ( 'Keys must be of the form <dialectname>_<argname>' ) #NEWLINE# #UNINDENT# else : #NEWLINE# #INDENT# self . obj . dialect_options [ dialect ] [ value_key ] = value