@register.filter
def followers(user):
    try:
        return Relationship.objects.get_followers_for_user(user)
    except AttributeError:
        pass
STDERR filter output: green foreground and white on red background
dataset/ETHPy150Open nathanborror/django-basic-apps/basic/relationships/templatetags/relationships.py/followers--crossover with--dataset/ETHPy150Open gabrielfalcao/couleur/test_stderr_filter.py/test_output_green_and_red_on_white_foreground