mirror of https://github.com/ecmwf/eccodes.git
88 lines
2.1 KiB
Python
88 lines
2.1 KiB
Python
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# Copyright 2005-2015 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 granted to it by
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# virtue of its status as an intergovernmental organisation 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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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)
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# open otput bufr file
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fout = open(OUTPUT,'w')
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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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gid = codes_bufr_new_from_file(fin)
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if gid is None: 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(gid,'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 and 2m temperature
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# set centre
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val=222
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print ' set centre to: %d' % val
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key='centre'
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if not codes_is_defined(gid,key):
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raise Exception("Key: " + key + " was not defined")
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codes_set(gid,key,val)
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#check centre's value
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print ' %s''s new value is: %d' % (key,codes_get(gid,key))
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# write modified message to output
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codes_write(gid,fout)
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cnt+=1
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# delete handle
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codes_release(gid)
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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,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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print >>sys.stderr,err.msg
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return 1
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if __name__ == "__main__":
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sys.exit(main())
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