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#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()

origin = "ammc"
modelVersionDate = "2014-01-01"

def retrieve_BoM_reforecast():
    """
       A function to demonstrate how to iterate efficiently over all hincastYearshindcastYears, hincastMonthshindcastMonths etc
    """
    hindcastYearStart = 1981
    hindcastYearEnd = 2013
    hindcastMonthStart = 1
    hindcastMonthEnd = 12
    hindcastDays = list(range(1, 27, 5)) # hindcastDaysavailable every available5 aredays: 1, 6, 11, 21., 26 

    for hindcastYear in list(range(hindcastYearStart, hindcastYearEnd + 1)):
        for hindcastMonth in list(range(hindcastMonthStart, hindcastMonthEnd + 1)):
            hindcastDates = []
            for hindcastDay in hindcastDays:
                hindcastDate = '%04d%02d%02d' % (
                    hindcastYear, hindcastMonth, hindcastDay)
                hindcastDates.append(hindcastDate)
            target = "%s%04d%02d.grb" % (origin, hindcastYear, eehindcastMonth)
            target =print "data_s2s_ammc_%04d%02d.grb" % (hindcastYear, hindcastMonth"/".join(hindcastDates)
            BoM_reforecast_request("/".join(hindcastDates), target)

def BoM_reforecast_request(hindcastDate, target):
    """
       A BoM reforecast requests. Change the keywords below to adapt it to your needs.
    """
    modelVersionDate = "2014-01-01"
    server.retrieve({
        "class": "s2",
        "dataset": "s2s",
        "date": modelVersionDate,
        "expver": "prod",
        "hdate": hindcastDate,
        "levtype": "pl",
        "levelist": "500/700/850/925/1000",
        "origin": "ammc"origin,
        "param": "130/156",
        "step": "24/to/720/by/24",
        "stream": "enfh",
        "target": target,
        "time": "00",
        "number": "1/to32to/31/by/1",
        "type": "pf",
    })

if __name__ == '__main__':
    retrieve_BoM_reforecast()