How to schedule Django shell command every week?

Question

I'm trying to let a certain Python script run every week in the Django shell. How can I accomplish this? I've read about cron & django-rq, but I don't think this is possible within the given parameters.

Thanks in advance!

PS.: the code in question, it just deletes the old database and adds the updated one:

from formcheck.models import FormCheck
import csv

FormCheck.objects.all().delete()

formcheck_csv = open('PolisCheck.csv', 'r', encoding = "utf-8") 
reader = csv.reader(formcheck_csv)
headers = next(reader, None)[1:]

for row in reader:  
   polis_dict = {}
   for h, val in zip(headers, row[1:]):
      polis_dict[h] = val
   formcheck = FormCheck.objects.create(**polis_dict)

formcheck_csv.close()  
exit()