mirror of https://github.com/ecmwf/eccodes.git
76 lines
1.6 KiB
Python
76 lines
1.6 KiB
Python
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# 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: grib_read_sample
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#
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# Description: read key values from a GRIB sample message.
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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):
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# open GRIB file
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f = open(INPUT)
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# These keys should be in the sample files
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keys = [
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'identifier',
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'editionNumber',
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'year',
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'month',
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'latitudeOfFirstGridPointInDegrees',
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'longitudeOfFirstGridPointInDegrees',
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'bitsPerValue',
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'stepType',
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'packingType'
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]
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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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gid = codes_grib_new_from_file(f)
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if gid is None:
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break
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print("message: %s" % cnt)
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for key in keys:
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print(' %s=%s' % (key, codes_get(gid, key)))
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cnt += 1
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codes_release(gid)
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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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