mirror of https://github.com/ecmwf/eccodes.git
88 lines
2.3 KiB
Python
88 lines
2.3 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_keys_iterator
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#
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# Description: Example on how to use keys_iterator functions and the
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# codes_keys_iterator structure to get all the available
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# keys in a BUFR message.
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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_1.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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# get key iterator for a given namespace
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iterid = codes_keys_iterator_new(gid,'ls')
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# Different types of keys can be skipped
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# codes_skip_computed(iterid)
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# codes_skip_coded(iterid)
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# codes_skip_edition_specific(iterid)
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# codes_skip_duplicates(iterid)
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# codes_skip_read_only(iterid)
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# codes_skip_function(iterid)
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#loop over the keys
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while codes_keys_iterator_next(iterid):
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# print key name
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keyname = codes_keys_iterator_get_name(iterid)
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#keyval = codes_get_string(iterid,keyname)
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#print "%s = %s" % (keyname,keyval)
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print " %s" % keyname
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# delete the key iterator
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codes_keys_iterator_delete(iterid)
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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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