mirror of https://github.com/ecmwf/eccodes.git
121 lines
3.2 KiB
Python
121 lines
3.2 KiB
Python
# Copyright 2005-2015 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_get_keys
|
|
#
|
|
# Description: how to read values of different type of keys from BUFR messages.
|
|
#
|
|
#
|
|
|
|
import traceback
|
|
import sys
|
|
|
|
from eccodes import *
|
|
|
|
INPUT='../../data/bufr/syno_multi.bufr'
|
|
VERBOSE=1 # verbose error reporting
|
|
|
|
def example():
|
|
|
|
# open bufr file
|
|
f = open(INPUT)
|
|
|
|
cnt=0
|
|
|
|
# loop for the messages in the file
|
|
while 1:
|
|
# get handle for message
|
|
gid = codes_bufr_new_from_file(f)
|
|
if gid is None: break
|
|
|
|
print "message: %s" % cnt
|
|
|
|
# we need to instruct ecCodes to expand all the descriptors
|
|
# i.e. unpack the data values
|
|
codes_set(gid,'unpack',1);
|
|
|
|
#----------------------------------------------
|
|
# get values for keys holding a single value
|
|
#----------------------------------------------
|
|
|
|
#Native type integer
|
|
key='blockNumber'
|
|
if not codes_is_defined(gid,key):
|
|
raise Exception("Key: " + key + " was not defined")
|
|
print ' %s: %s' % (key,codes_get(gid,key))
|
|
|
|
#Native type integer
|
|
key='stationNumber'
|
|
if not codes_is_defined(gid,key):
|
|
raise Exception("Key: " + key + " was not defined")
|
|
print ' %s: %s' % (key,codes_get(gid,key))
|
|
|
|
#Native type float
|
|
key='airTemperatureAt2M'
|
|
if not codes_is_defined(gid,key):
|
|
raise Exception("Key: " + key + " was not defined")
|
|
print ' %s: %s' % (key,codes_get(gid,key))
|
|
|
|
#Native type string
|
|
key='typicalDate'
|
|
if not codes_is_defined(gid,key):
|
|
raise Exception("Key: " + key + " was not defined")
|
|
print ' %s: %s' % (key,codes_get(gid,key))
|
|
|
|
|
|
#---------------------------------
|
|
# get values for an array
|
|
#---------------------------------
|
|
|
|
# Native type integer
|
|
key='bufrdcExpandedDescriptors'
|
|
|
|
# get size
|
|
num=codes_get_size(gid,key)
|
|
print ' size of %s is: %s' % (key,num)
|
|
|
|
# get values
|
|
values=codes_get_array(gid,key)
|
|
for i in xrange(len(values)):
|
|
print " %d %06d" % (i+1,values[i])
|
|
|
|
# Native type float
|
|
key='numericValues'
|
|
|
|
# get size
|
|
num=codes_get_size(gid,key)
|
|
print ' size of %s is: %s' % (key,num)
|
|
|
|
# get values
|
|
values=codes_get_array(gid,key)
|
|
for i in xrange(len(values)):
|
|
print " %d %.10e" % (i+1,values[i])
|
|
|
|
cnt+=1
|
|
|
|
# delete handle
|
|
codes_release(gid)
|
|
|
|
# close the file
|
|
f.close()
|
|
|
|
def main():
|
|
try:
|
|
example()
|
|
except CodesInternalError,err:
|
|
if VERBOSE:
|
|
traceback.print_exc(file=sys.stderr)
|
|
else:
|
|
print >>sys.stderr,err.msg
|
|
|
|
return 1
|
|
|
|
if __name__ == "__main__":
|
|
sys.exit(main())
|