Re- forecasts: 1 param, 1 date

Retrieving  1 field (10m U wind) for all time steps and for the 14 May 2014

#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
    "class": "s2",
    "dataset": "s2s",
    "hdate": "2014-05-14",
    "date": "2015-05-14",
    "expver": "prod",
    "levtype": "sfc",
    "origin": "ecmf",
    "param": "165",
    "step": "0/to/1104/by/24",
    "stream": "enfh",
    "target": "CHANGEME",
    "time": "00",
    "type": "cf",
})
#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
    "class": "s2",
    "dataset": "s2s",
    "hdate": "2014-05-14",
    "date": "2015-05-14",
    "expver": "prod",
    "levtype": "sfc",
    "origin": "ecmf",
    "param": "165",
    "step": "0/to/1104/by/24",
    "stream": "enfh",
    "target": "CHANGEME",
    "time": "00", 
     "number": "1/to/10",
    "type": "pf",
 })

Re- forecasts used to calibrate a  real-time forecast:

Retrieving  1 param (10m U wind) for all time steps and used to calibrate the 14 May 2015 real-time forecast.  

#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
    "class": "s2",
    "dataset": "s2s",
    "hdate": "1995-05-14/1996-05-14/1997-05-14/1998-05-14/1999-05-14/2000-05-14/2001-05-14/2002-05-14/2003-05-14/2004-05-14/2005-05-14/2006-05-14/2007-05-14/2008-05-14/2009-05-14/2010-05-14/2011-05-14/2012-05-14/2013-05-14/2014-05-14",
    "date": "2015-05-14",
    "expver": "prod",
    "levtype": "sfc",
    "origin": "ecmf",
    "param": "165",
    "step": "0/to/1104/by/24",
    "stream": "enfh",
    "target": "CHANGEME",
    "time": "00",
    "type": "cf",
})

#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
    "class": "s2",
    "dataset": "s2s",
    "hdate": "1995-05-14/1996-05-14/1997-05-14/1998-05-14/1999-04-14/2000-05-14/2001-05-14/2002-05-14/2003-05-14/2004-05-14/2005-05-14/2006-05-14/2007-05-14/2008-05-14/2009-05-14/2010-05-14/2011-05-14/2012-05-14/2013-05-14/2014-05-14",
    "date": "2015-05-14",
    "expver": "prod",
    "levtype": "sfc",
    "origin": "ecmf",
    "param": "165",
    "step": "0/to/1104/by/24",
    "stream": "enfh",
    "target": "CHANGEME",
    "number": "1/to/10",
    "time": "00",
    "type": "pf",
})