mirror of https://github.com/ecmwf/eccodes.git
71 lines
1.7 KiB
Python
71 lines
1.7 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: 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 traceback
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import sys
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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 example():
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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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gid = codes_metar_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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#----------------------------------------------
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# get values for keys holding a single value
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#----------------------------------------------
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keys=['CCCC', 'latitude', 'longitude', 'dateTime', 'elevation', 'temperature', 'dewPointTemperature', 'qnh']
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for key in keys:
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try:
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print ' %s: %s' % (key,codes_get(gid,key))
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except CodesInternalError,err:
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print 'Error with key="%s" : %s' % (key,err.msg)
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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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