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# (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: gts_get_keys
#
# Description: how to read values of different type of keys from GTS messages.
#
from __future__ import print_function
import traceback
import sys
from eccodes import *
INPUT = '../../data/gts/EGRR20150317121020_00493212.DAT'
VERBOSE = 1 # verbose error reporting
def example():
# open GTS file
f = open(INPUT, 'rb')
cnt = 0
# loop for the messages in the file
while 1:
# get handle for message
gid = codes_gts_new_from_file(f)
if gid is None:
break
cnt += 1
print("message: %s" % cnt)
# ---------------------------------------------
# get values for keys holding a single value
# ---------------------------------------------
keys = ['TT', 'AA', 'II', 'CCCC', 'YY', 'GG', 'gg', 'BBB']
for key in keys:
try:
print(' %s: %s' % (key, codes_get(gid, key)))
except CodesInternalError as err:
print('Error with key="%s" : %s' % (key, err.msg))
# delete handle
codes_release(gid)
# close the file
f.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())
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