Creating Custom Filters in Django Admin

Using SimpleListFilter for Easy Implementation

from django.contrib import admin

class TicketStatusListFilter(admin.SimpleListFilter):
    title = 'Status'
    parameter_name = 'status_set'

    def lookups(self, request, model_admin):
        return (
            ('incomplete', 'Incomplete'),
            ('completed', 'Completed'),
        )

    def queryset(self, request, queryset):
        if self.value() == 'incomplete':
            return queryset.exclude(status='completed')
        if self.value() == 'completed':
            return queryset.filter(status='completed')

class TicketAdmin(admin.ModelAdmin):
    list_filter = (TicketStatusListFilter,)