mirror of https://github.com/ecmwf/eccodes.git
93 lines
2.8 KiB
Python
93 lines
2.8 KiB
Python
# (C) Copyright 2005- ECMWF.
|
|
#
|
|
# This software is licensed under the terms of the Apache Licence Version 2.0
|
|
# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
|
|
#
|
|
# In applying this licence, ECMWF does not waive the privileges and immunities
|
|
# granted to it by virtue of its status as an intergovernmental organisation
|
|
# nor does it submit to any jurisdiction.
|
|
|
|
# Python Implementation: grib_set_keys
|
|
#
|
|
# Description: how to set key values in GRIB messages
|
|
#
|
|
|
|
from __future__ import print_function
|
|
|
|
import sys
|
|
import traceback
|
|
from collections import OrderedDict
|
|
from datetime import date
|
|
|
|
from eccodes import *
|
|
|
|
INPUT = "../../data/regular_latlon_surface_constant.grib1"
|
|
OUTPUT = "out.set.grib"
|
|
VERBOSE = 1 # verbose error reporting
|
|
|
|
|
|
def example():
|
|
fin = open(INPUT, "rb")
|
|
fout = open(OUTPUT, "wb")
|
|
gid = codes_grib_new_from_file(fin)
|
|
|
|
dt = date.today()
|
|
today = "%d%02d%02d" % (dt.year, dt.month, dt.day)
|
|
codes_set(gid, "dataDate", int(today))
|
|
codes_set(gid, "centre", 80)
|
|
|
|
centreIntVal = codes_get_array(gid, "centre", int)
|
|
centreStrVal = codes_get_array(gid, "centre", str)
|
|
dateStrVal = codes_get_array(gid, "dataDate", str)
|
|
assert centreIntVal[0] == 80
|
|
assert centreStrVal[0] == "cnmc"
|
|
assert dateStrVal[0] == today
|
|
print("get centre as an integer - centre = %d" % centreIntVal[0])
|
|
print("get centre as a string - centre = %s" % centreStrVal[0])
|
|
print("get date as a string - date = %s" % dateStrVal[0])
|
|
|
|
# Now do the same but using set_key_vals, setting keys all at once
|
|
print("set keys using one long comma-separated string...")
|
|
codes_set_key_vals(gid, "level=1,centre=98")
|
|
assert codes_get(gid, "centre", str) == "ecmf"
|
|
assert codes_get(gid, "level", int) == 1
|
|
|
|
print("set keys using a list of strings...")
|
|
codes_set_key_vals(gid, ["level=2", "centre=kwbc"])
|
|
assert codes_get(gid, "centre", int) == 7
|
|
assert codes_get(gid, "level", int) == 2
|
|
|
|
print("set keys using a dictionary (order not as specified!)...")
|
|
codes_set_key_vals(gid, {"level": 3, "centre": 84})
|
|
assert codes_get(gid, "centre", str) == "lfpw"
|
|
assert codes_get(gid, "level", int) == 3
|
|
|
|
print("set keys using an ordered dictionary...")
|
|
codes_set_key_vals(gid, OrderedDict([("level", 3), ("centre", 84)]))
|
|
assert codes_get(gid, "centre", str) == "lfpw"
|
|
assert codes_get(gid, "level", int) == 3
|
|
|
|
codes_gts_header(True)
|
|
codes_gts_header(False)
|
|
|
|
codes_write(gid, fout)
|
|
codes_release(gid)
|
|
fin.close()
|
|
fout.close()
|
|
|
|
|
|
def main():
|
|
try:
|
|
example()
|
|
except CodesInternalError as err:
|
|
if VERBOSE:
|
|
traceback.print_exc(file=sys.stderr)
|
|
else:
|
|
sys.stderr.write(err.msg + "\n")
|
|
|
|
return 1
|
|
|
|
|
|
if __name__ == "__main__":
|
|
sys.exit(main())
|