#!/usr/bin/env python

from __future__ import print_function
from .gribapi import *
import sys

input=sys.argv[1]

fid = open(input,"r")
oid = open("test","w")

while 1:
    gid = grib_new_from_file(fid)
    if gid is None: break

    print (grib_get(gid,"centre"))
    print (grib_get(gid,"centre",int))
    print (grib_get(gid,"centre",float))
    print (grib_get(gid,"centre",str))

    print ("Nvalues = ",grib_get_size(gid,"values"))

    values = grib_get_array(gid,"values")
    print (values[:10])
    values = values * 2

    grib_set_double_array(gid,"values",values)

    values = grib_get_array(gid,"values")
    print (values[:10])
    values = values / 2

    grib_set_double_array(gid,"values",[1])

    values = grib_get_values(gid)
    print (values[:10])

    print (grib_get(gid,"bitsPerValue"))
    grib_set(gid,"bitsPerValue",10)
    print (grib_get(gid,"bitsPerValue"))

    grib_write(gid,oid)

    grib_release(gid)

oid.close()
fid.close()