mirror of https://github.com/ecmwf/eccodes.git
74 lines
2.3 KiB
Python
74 lines
2.3 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_copy_data
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#
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# Description: How to copy all the values in the data section that are present in the same
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# position in the data tree and with the same number of values to the output handle.
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# This example is for messages which use the operator 203YYY (overridden reference values)
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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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VERBOSE = 1 # verbose error reporting
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def example(input_filename, output_filename):
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f = open(input_filename, 'rb')
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ibufrin = codes_bufr_new_from_file(f)
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f.close()
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# Need to unpack to get delayed replications and reference values from input
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codes_set(ibufrin,'unpack',1)
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references=codes_get_array(ibufrin,'inputOverriddenReferenceValues')
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replication=codes_get_array(ibufrin,'delayedDescriptorReplicationFactor')
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ibufrout=codes_clone(ibufrin)
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# Copy over to output
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codes_set_array(ibufrout,'inputOverriddenReferenceValues',references)
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codes_set_array(ibufrout,'inputDelayedDescriptorReplicationFactor',replication)
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# Keep all original descriptors and add 'meanWindDirectionForSurfaceTo1500M' (011044)
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ivalues=( 203014, 7030, 7031, 203255, 307080, 11044, )
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codes_set_array(ibufrout,'unexpandedDescriptors',ivalues)
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codes_bufr_copy_data ( ibufrin,ibufrout)
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outfile=open(output_filename, 'wb')
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codes_write(ibufrout,outfile)
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outfile.close()
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codes_release(ibufrin)
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codes_release(ibufrout)
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def main():
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if len(sys.argv) < 3:
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print('Usage: ', sys.argv[0], ' bufr_in bufr_out', file=sys.stderr)
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sys.exit(1)
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input_filename = sys.argv[1]
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output_filename = sys.argv[2]
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try:
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example(input_filename, output_filename)
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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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