#NEWLINE# def _set_bind_addr( self , value ) : #NEWLINE# #INDENT# if ( isinstance ( value , tuple ) and ( value [ 0 ] in ( '' , None ) ) ) : #NEWLINE# #INDENT# raise ValueError ( "Host values of '' or None are not allowed. Use '0.0.0.0' (IPv4) or '::' (IPv6) instead to listen on all active interfaces." ) #NEWLINE# #UNINDENT# self . _bind_addr = self