mirror of https://github.com/ecmwf/eccodes.git
89 lines
2.1 KiB
Python
89 lines
2.1 KiB
Python
# 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_subset
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#
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# Description: how to read data values from a given subset of a BUFR message.
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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/synop_multi_subset.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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f = open(INPUT)
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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(f)
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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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# find out the number of subsets
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key='numberOfSubsets'
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numberOfSubsets=codes_get(gid,'numberOfSubsets')
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print ' %s: %d' % (key,numberOfSubsets)
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# loop over the subsets
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for i in range(numberOfSubsets) :
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#specify the subset number
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codes_set(gid,'subsetNumber',0)
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# read and print some data values
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key='blockNumber'
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val=codes_get(gid,key)
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print ' %s: %d' % (key,val)
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key='stationNumber'
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val=codes_get(gid,key)
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print ' %s: %d' % (key,val)
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#key='airTemperatureAt2M'
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#val=codes_get(gid,key)
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#print ' %d: %d' % (key,val)
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cnt+=1
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# delete handle
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codes_release(gid)
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# close the file
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f.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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