#!/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()