#NEWLINE# def serialize_value( self , value ) : #NEWLINE# #INDENT# '\n        `value` is the list of chosen choices. Join them together with\n        commas, escaping literal commas in the choice with a backslash.\n        This quoting method was chosen to not cause any ambiguity when\n        choices contain commas.\n        ' #NEWLINE# return ',' . join ( ( i . replace ( '\\' , '\\\\' ) . replace ( ',' , '\\,' ) for i in self ) )