mirror of https://github.com/ecmwf/eccodes.git
97 lines
2.1 KiB
Python
97 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: metar_get_keys
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#
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# Description: how to read values of different type of keys from METAR messages
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#
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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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INPUT = "../../data/metar/metar.txt"
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VERBOSE = 1 # verbose error reporting
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def print_keys(msg_id):
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keys = [
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"CCCC",
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"latitude",
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"longitude",
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"dateTime",
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"elevation",
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"temperature",
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"dewPointTemperature",
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"qnh",
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]
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for key in keys:
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try:
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if codes_is_defined(msg_id, key):
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print(" %s: %s" % (key, codes_get(msg_id, key)))
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except CodesInternalError as err:
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print('Error with key="%s" : %s' % (key, err.msg))
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def example1():
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# open METAR 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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msg_id = codes_metar_new_from_file(f)
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if msg_id is None:
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break
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print("message: %s" % cnt)
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print_keys(msg_id)
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cnt += 1
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# delete handle
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codes_release(msg_id)
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# close the file
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f.close()
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def example2():
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# This time read from a string rather than a file.
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metar_str = "METAR LQMO 022350Z 09003KT 6000 FEW010 SCT035 BKN060 08/08 Q1003="
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# get handle for message
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msg_id = codes_new_from_message(metar_str)
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print("\nFrom string: '%s'" % metar_str)
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print_keys(msg_id)
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codes_release(msg_id)
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def main():
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try:
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example1()
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example2()
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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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