mirror of https://github.com/ecmwf/eccodes.git
89 lines
2.0 KiB
Python
89 lines
2.0 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_read_sample
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#
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# Description: read key values from a BUFR sample message.
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#
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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 get_key_value(msgid, key):
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v = codes_get(msgid, key)
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if v == CODES_MISSING_DOUBLE or v == CODES_MISSING_LONG:
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v = "MISSING"
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return v
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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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# These keys should be in the sample files
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keys = [
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"editionNumber",
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"unexpandedDescriptors",
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"blockNumber",
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"stationNumber",
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"verticalSignificanceSurfaceObservations",
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"latitude",
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"longitude",
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"24HourPressureChange",
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"horizontalVisibility",
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"#1#cloudAmount", # cloud amount (low and mid level)
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"#1#heightOfBaseOfCloud",
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"#1#cloudType", # cloud type (low clouds)
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"#2#cloudType", # cloud type (middle clouds)
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"#3#cloudType", # cloud type (highclouds)
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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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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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codes_set(bufr, "unpack", 1)
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for key in keys:
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print(" %s=%s" % (key, get_key_value(bufr, key)))
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cnt += 1
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codes_release(bufr)
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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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