mirror of https://github.com/ecmwf/eccodes.git
93 lines
2.1 KiB
Python
93 lines
2.1 KiB
Python
# Copyright 2005-2018 ECMWF.
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#
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# This software is licensed under the terms of the Apache Licence Version 2.0
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# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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#
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# In applying this licence, ECMWF does not waive the privileges and immunities
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# granted to it by virtue of its status as an intergovernmental organisation
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# nor does it submit to any jurisdiction.
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#
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# Python implementation: bufr_set_keys
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#
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# Description: how to set different type of keys in BUFR messages.
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#
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#
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from __future__ import print_function
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import traceback
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import sys
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from eccodes import *
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INPUT = '../../data/bufr/syno_multi.bufr'
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OUTPUT = 'bufr_set_keys_test_p.tmp.bufr'
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VERBOSE = 1 # verbose error reporting
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def example():
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# open BUFR file
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fin = open(INPUT, 'rb')
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# open output BUFR file
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fout = open(OUTPUT, 'wb')
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cnt = 0
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# loop for the messages in the file
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while 1:
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# get handle for message
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bufr = codes_bufr_new_from_file(fin)
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if bufr is None:
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break
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print("message: %s" % cnt)
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# we need to instruct ecCodes to expand all the descriptors
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# i.e. unpack the data values
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# codes_set(bufr,'unpack',1)
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# This is the place where you may wish to modify the message
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# E.g. we change the centre
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# set centre
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val = 222
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print(' set bufrHeaderCentre to: %d' % val)
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key = 'bufrHeaderCentre'
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try:
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print(' %s: %s' % (key, codes_set(bufr, key, val)))
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except CodesInternalError as err:
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print('Error with key="%s" : %s' % (key, err.msg))
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# check bufrHeaderCentre's value
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print(' %s''s new value is: %d' % (key, codes_get(bufr, key)))
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# write modified message to output
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codes_write(bufr, fout)
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cnt += 1
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# delete handle
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codes_release(bufr)
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fin.close()
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fout.close()
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def main():
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try:
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example()
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except CodesInternalError as err:
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if VERBOSE:
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traceback.print_exc(file=sys.stderr)
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else:
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sys.stderr.write(err.msg + '\n')
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return 1
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if __name__ == "__main__":
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sys.exit(main())
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