Python Date time object creation and filter data with Django ORM

Datetime.py

"""
python manage.py runscript <script name> --script-args <args>
"""
import datetime
from contact.v2.models import TestModel
from django.utils import timezone


def run():
    start_date = (timezone.now().date() - timezone.timedelta(days=1)).strftime('%Y-%m-%d') + 'T20:00:00'
    end_date = timezone.now().date().strftime('%Y-%m-%d') + 'T20:00:00'
    print(end_date)
    data = TestModel.objects.filter(created_at__range=(start_date, end_date)).values()
    print(data)

    for date in range(12, 31):
        start = '2018-10-{}T20:00:00'.format(date)
        datetime_obj = datetime.datetime.strptime(start, '%Y-%m-%dT%H:%M:%S')
        first_date = (datetime_obj - timezone.timedelta(days=1)).strftime('%Y-%m-%d') + 'T20:00:00'
        if date == 15:
            data = TestModel.objects.filter(created_at=start)
            print(data)
            # then push data into another server
        else:
            data = TestModel.objects.filter(created_at__range=(first_date, start))
            print(data)