#NEWLINE# def get_missing_attributes( self ) : #NEWLINE# #INDENT# missing = [ ] #NEWLINE# for attribute in [ 'nu' , 'chi' , 'albedo' , 'mu' , 'P1' , 'P2' , 'P3' , 'P4' ] : #NEWLINE# #INDENT# if ( getattr ( self , attribute ) is None ) : #NEWLINE# #INDENT# missing . append ( self ) #NEWLINE# #UNINDENT# #UNINDENT# return missing