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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: bufr_set_keys
#
# Description: how to set different type of keys in BUFR messages.
#
#
import sys
import traceback
from eccodes import *
INPUT = "../../data/bufr/syno_multi.bufr"
OUTPUT = "bufr_set_keys_test_p.tmp.bufr"
VERBOSE = 1 # verbose error reporting
def example():
# open BUFR file
fin = open(INPUT, "rb")
# open output BUFR file
fout = open(OUTPUT, "wb")
cnt = 0
# loop for the messages in the file
while 1:
# get handle for message
bufr = codes_bufr_new_from_file(fin)
if bufr is None:
break
print("message: %s" % cnt)
# we need to instruct ecCodes to expand all the descriptors
# i.e. unpack the data values
# codes_set(bufr,'unpack',1)
# This is the place where you may wish to modify the message
# E.g. we change the centre
# set centre
val = 222
print(" set bufrHeaderCentre to: %d" % val)
key = "bufrHeaderCentre"
try:
print(" %s: %s" % (key, codes_set(bufr, key, val)))
except CodesInternalError as err:
print('Error with key="%s" : %s' % (key, err.msg))
# check bufrHeaderCentre's value
print(" %s" "s new value is: %d" % (key, codes_get(bufr, key)))
# write modified message to output
codes_write(bufr, fout)
cnt += 1
# delete handle
codes_release(bufr)
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())
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