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# (C) Copyright 2005- ECMWF.
#
# This software is licensed under the terms of the Apache Licence Version 2.0
# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
#
# In applying this licence, ECMWF does not waive the privileges and immunities
# granted to it by virtue of its status as an intergovernmental organisation
# nor does it submit to any jurisdiction.
#
# Python implementation: bufr_read_sample
#
# Description: read key values from a BUFR sample message.
#
from __future__ import print_function
import traceback
import sys
from eccodes import *
VERBOSE = 1 # verbose error reporting
def get_key_value(msgid, key):
v = codes_get(msgid, key)
if v == CODES_MISSING_DOUBLE or v == CODES_MISSING_LONG:
v = 'MISSING'
return v
def example(INPUT):
# open BUFR file
f = open(INPUT, 'rb')
# These keys should be in the sample files
keys = [
'editionNumber',
'unexpandedDescriptors',
'blockNumber',
'stationNumber',
'verticalSignificanceSurfaceObservations',
'latitude',
'longitude',
'24HourPressureChange',
'horizontalVisibility',
'#1#cloudAmount', # cloud amount (low and mid level)
'#1#heightOfBaseOfCloud',
'#1#cloudType', # cloud type (low clouds)
'#2#cloudType', # cloud type (middle clouds)
'#3#cloudType' # cloud type (highclouds)
]
cnt = 0
# Loop for the messages in the file
while 1:
bufr = codes_bufr_new_from_file(f)
if bufr is None:
break
print("message: %s" % cnt)
codes_set(bufr, 'unpack', 1)
for key in keys:
print(' %s=%s' % (key, get_key_value(bufr, key)))
cnt += 1
codes_release(bufr)
f.close()
def main():
try:
example(sys.argv[1])
except CodesInternalError as err:
if VERBOSE:
traceback.print_exc(file=sys.stderr)
else:
sys.stderr.write(err.msg + '\n')
return 1
if __name__ == "__main__":
sys.exit(main())
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