def add_pilots_corps_to_db(kills_data):
    for i in reversed(kills_data):
        if int(i["victim"]["characterID"]) and int(i["victim"]["corporationID"]):
            c=corp(id=i["victim"]["corporationID"],
                 name=i["victim"]["corporationName"])
            c.save()
            pilot(id=i["victim"]["characterID"],
                  name=i["victim"]["characterName"],
                  corp=c).save()

from django.db import transaction

@transaction.atomic
def add_pilots_corps_to_db(kills_data):
   ...