list sorting case insensitive using operator.attrgetter

Question

hi i have list of dictionaries .. and i want to sort it case insensitive

members = Person.objects.filter(person=person_id)
members_list = list(members)

members_list.sort( key = operator.attrgetter( sort_by ), reverse = False )

here sort_by have attribute name by whom i want to sort. Now how can i sort with case insensitive ??

Please help..

Answer 1

members_list.sort( key = lambda member: getattr(member,sort_by).lower(), reverse = False )

Answer 2

If sort_by is a variable containing a string with the name of the attribute you want to use for sorting and you want to use operator.attrgetter(), you could use this which converts the value of the attribute it fetches to all lowercase characters for comparisons during the sort:

members_list.sort( key = lambda mbr: operator.attrgetter( sort_by )( mbr ).lower(),
                   reverse = False )

Although something like the following is easier to read as well as more efficient:

get_key = operator.attrgetter( sort_by )
members_list.sort( key = lambda mbr: get_key( mbr ).lower(), reverse = False )