prozorro_sale.jobber.state_machine.calculator
# todo: refactor this module, functions for specs version 1 and 2
import operator
import re
import pytz
from datetime import date, datetime, timedelta, time # noqa
from secrets import SystemRandom
from schematics.exceptions import DataError
from schematics import Model
from prozorro_sale.jobber.config import get_date_config, get_app_tz