mirror of https://github.com/ecmwf/eccodes.git
87 lines
2.1 KiB
Python
87 lines
2.1 KiB
Python
# (C) Copyright 2005- 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_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_bufr_keys_iterator structure to get all the available
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# keys in a BUFR message.
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from __future__ import print_function
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import sys
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import traceback
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from eccodes import *
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VERBOSE = 1 # verbose error reporting
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def example(INPUT):
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# open bufr file
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f = open(INPUT, "rb")
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cnt = 0
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subset = 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(f)
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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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# get BUFR key iterator
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iterid = codes_bufr_keys_iterator_new(bufr)
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# loop over the keys
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while codes_bufr_keys_iterator_next(iterid):
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# print key name
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keyname = codes_bufr_keys_iterator_get_name(iterid)
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if keyname == "subsetNumber":
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subset += 1
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print(" Subset: %d" % subset)
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else:
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print(" %s" % keyname)
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# delete the key iterator
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codes_bufr_keys_iterator_delete(iterid)
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cnt += 1
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# delete handle
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codes_release(bufr)
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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(sys.argv[1])
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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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