def find_unmatched_buildings(import_file):
    return BuildingSnapshot.objects.filter(
        ~models.Q(source_type__in=[
            COMPOSITE_BS, ASSESSED_RAW, PORTFOLIO_RAW, GREEN_BUTTON_RAW
        ]),
        match_type=None,
        import_file=import_file,
        canonical_building=None,
    )
Initialize a variable (selects a new identifier)
dataset/ETHPy150Open buildingenergy/buildingenergy-platform/seed/models.py/find_unmatched_buildings--crossover with--dataset/ETHPy150Open nltk/nltk/nltk/ccg/api.py/CCGVar.__init__