get_cost_forecast_sample.py

#!/usr/bin/env python
# vim:fileencoding=utf-8

import os
import requests
import datetime
import boto3
from dateutil.relativedelta import relativedelta

dt = datetime.datetime.now()

tomorrow               = (dt + datetime.timedelta(days=1)).strftime("%Y-%m-%d")
next_month_first_date  = (dt + relativedelta(months=+1, day=1)).strftime("%Y-%m-%d")

ce  = boto3.client("ce", region_name="us-east-1")
res = ce.get_cost_forecast(TimePeriod={"Start": tomorrow, "End": next_month_first_date}, Granularity='MONTHLY', Metric="UNBLENDED_COST")
amount = float(res["Total"]["Amount"])
print("forcast is USD{0:,.2f}".format(amount))