This example shows: how to read values of different type of keys from BUFR messages.
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CFortran 90
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cppnone
title
bufr_get_keys.cf90
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false
/*
* !
!(C) 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.
*/!!/*
!*FORTRANC90 Implementation: bufr_get_keys
*! *! Description: how to read values of different type of keys from BUFR messages.
! *
*/
#include "eccodes.h"
int main(int argc,char* argv[])
{
!
program bufr_get_keys
use eccodes
implicit none
integer FILE*in=NULL;
::ifile
integer/*messagehandle.Requiredinalltheeccodescallsactingona message.*/
:: iret
integercodes_handle* h=NULL;
long *descriptors=NULL;
:: ibufr
integerdouble*values=NULL;
char*typicalDate= NULL;
:: i, count=0
integer(kind=4)long longVal;
:: blockNumber,stationNumber
real(kind=8)doubledoubleVal;
size_t values_len=0, desc_len=0, len=0;
int i, err=0;
int cnt=0;
const char* infile = "../../:: t2m
integer(kind=4), dimension(:), allocatable :: descriptors
real(kind=8), dimension(:), allocatable :: values
character(len=9) :: typicalDate
call codes_open_file(ifile,'../../data/bufr/syno_multi.bufr";','r')! in=fopen(infile,"r");
if (!in) {
printf("ERROR: unable to open file %s\n", infile);
return 1;
}The first bufr message is loaded from file,
! ibufr is the bufr id to be used in subsequent calls
call codes_bufr_new_from_file(ifile,ibufr,iret)
do while (iret/=CODES_END_OF_FILE)/* loop over the messages in! Get and print some keys form the bufr file */BUFR headerwhile ((h = codes_handle_new_from_file(NULL,in,PRODUCT_BUFR,&err)) != NULL || err != CODES_SUCCESS)
{write(*,*) 'message: ',count
! We need to instruct ecCodes to expand all the descriptors!i.e.unpacktheif (h == NULL) {data values
call codes_set(ibufr,"unpack",1);
!Getascharacter
callprintf("Error: unable to create handle for message %d\n",cnt);codes_get(ibufr,'typicalDate',typicalDate)
write(*,*) ' typicalDate:',typicalDate
!Getasinteger
cnt++call codes_get(ibufr,'blockNumber',blockNumber);
write(*,*)' continue;blockNumber:',blockNumber
!Getas }
integer printf("message: %d\n",cnt);
call codes_get(ibufr,'stationNumber',stationNumber); /* we need to instruct ecCodes to expand the descriptors write(*,*) ' stationNumber:',stationNumber
! get as realcallcodes_get(ibufr,'airTemperatureAt2M',t2m);
i.e. unpack the data values */write(*,*) ' airTemperatureAt2M:',t2m
CODES_CHECK(codes_set_long(h,"unpack",1),0);! ---- array of integer ----------------!getthe /* read and print some data values */
expanded descriptors
call codes_get(ibufr,'bufrdcExpandedDescriptors',descriptors)
/*longvalue */do i=1,size(descriptors)CODES_CHECK(codes_get_long(h,"blockNumber",&longVal),0);write(*,*) ' ',i,descriptors(i)enddo
printf(" blockNumber: %ld\n",longVal);! ---- array of real ----------------!Gettheexpanded/* long value */data values CODES_CHECK(call codes_get_long(h,"stationNumber",&longVal),0);ibufr,'numericValues',values)
printf(" stationNumber: %ld\n",longVal);
do i=1,size(values)
write(*,*) ' ',i,values(i)
enddo
/*!doubleGetvalueas*/charactercall CODES_CHECK(codes_get_double(h,"airTemperatureAt2M",&doubleVal),0);ibufr,'typicalDate',typicalDate)write(*,*)' printf(" airTemperatureAt2M: %f\n",doubleVal);
typicalDate:',typicalDate
!Freearrays
/* ---- string value -----------------*/ deallocate(values)
deallocate(descriptors)!Releasethe /* get the size and allocate memory*/
bufr message
call codes_release(ibufr)
! Load the next bufr message
callCODES_CHECK(codes_get_length(h, "typicalDate", &len), 0);codes_bufr_new_from_file(ifile,ibufr,iret)
count=count+1
typicalDate = (char*)malloc(len*sizeof(char));end do! /* get the values*/Close filecallcodes_getclose_string(h, "typicalDate", typicalDate, &len);
printf(" typicalDate: %s\n", typicalDate);
/* ---- array of long ----------------*/
/* get the size and allocate memory*/
CODES_CHECK(codes_get_size(h,"bufrdcExpandedDescriptors",&desc_len),0);
descriptors = (long*)malloc(desc_len*sizeof(long));
/* get the values */
CODES_CHECK(codes_get_long_array(h,"bufrdcExpandedDescriptors",descriptors,&desc_len),0);
printf(" bufrdcExpandedDescriptors:\n");
for(i = 0; i < desc_len; i++)
{
printf(" %ld\n",descriptors[file(ifile)
end program bufr_get_keys
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Python
Code Block
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python
title
bufr_get_keys.py
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false
# (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_get_keys
#
# Description: how to read values of different type of keys from BUFR messages.
#
#
import sys
import traceback
from eccodes import *
INPUT = '../../data/bufr/syno_multi.bufr'
VERBOSE = 1 # verbose error reporting
def example():
# open bufr file
f = open(INPUT, 'rb')
cnt = 0
# loop for the messages in the file
while 1:i]);
}
/* ---- array of double ---------------*/
# get handle for message
bufr = codes_bufr_new_from_file(f)
if bufr is None:
/*getthesizeandallocatememory*/break
CODES_CHECK(codes_get_size(h,"numericValues",&values_len),0);print("message: %s" % cnt)
values#= (double*)malloc(values_len*sizeof(double));
/* get the values*/
we need to instruct ecCodes to expand all the descriptors
#i.e. CODES_CHECK(codes_get_double_array(h,"numericValues",values,&values_len),0);unpack the data valuesprintf(" numericValues:\n");codes_set(bufr, 'unpack', 1)
for(i = 0; i < values_len; i++)# ---------------------------------------------{
#getvaluesforkeysholdingasinglevalue
printf("%.10e\n",values[i]);
# ---------------------------------------------
}
# Native type integer
/*freeallocatedkeyarrays */= 'blockNumber'
free(descriptors);try:free(values);
print('%s: free(typicalDate);
%s' % (key, codes_get(bufr, key)))
/*exceptdeleteCodesInternalErrorhandleas*/err:codes_handle_delete(h);
print('Errorwithkey="%s" cnt++;
}: %s' % (key, err.msg))fclose(in);
return 0;
}
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Fortran 90
Code Block
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none
title
bufr_get_keys.f90
linenumbers
false
!
!Copyright 2005-2015 ECMWF.
!
! Thissoftwareislicensedunder#theNativetermstypeofinteger
theApacheLicenceVersion2.0
!whichcanbeobtainedkeyat 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.
!
!
! FOTRAN 90 Implementation: bufr_get_keys
!
! Description: how to read values of different type of keys from BUFR messages.
!
!
program bufr_get_keys
use eccodes
implicit none
integer = 'stationNumber'
try:
print(' %s: %s' % (key, codes_get(bufr, key)))
except CodesInternalError as err:
print('Error with key="%s" : %s' % (key, err.msg))
::ifile
integer#Nativetypefloat
key:: iret
integer= 'airTemperatureAt2M'
try:
::ibufr
integerprint('%s:%s'::%i(key, count=0
integer(kind=4)codes_get(bufr, key)))
:: blockNumber,stationNumber
real(kind=8) except CodesInternalError as err:
::t2m
integer(kind=4),dimension(:),allocatable::descriptors
real(kind=8), dimension(:), allocatable print('Error with key="%s" : %s' % (key, err.msg))
:: values
character(len=9)#::NativetypicalDatetype
call codes_open_file(ifile,'../../data/bufr/syno_multi.bufr','r')
! the first bufr message is loaded from file
! ibufr is the bufr id to be used in subsequent calls
call codes_bufr_new_from_file(ifile,ibufr,iret)
do while (iret/=CODES_END_OF_FILE)
! get and print some keys form the BUFR header
write(*,*) 'message: ',count
! we need to instruct ecCodes to expand all the descriptors
! i.e. unpack the data values
call codes_set(ibufr,"unpack",1);
! get as character
call codes_get(ibufr,'typicalDate',typicalDate)
write(*,*) ' typicalDate:',typicalDate
! get as integer
call codes_get(ibufr,'blockNumber',blockNumber);
write(*,*) ' blockNumber:',blockNumber
! get as integer
call codes_get(ibufr,'stationNumber',stationNumber);
write(*,*) ' stationNumber:',stationNumber
! get as real
call codes_get(ibufr,'airTemperatureAt2M',t2m);
write(*,*) ' airTemperatureAt2M:',t2m
! ---- array of integer ----------------
! get the exapanded descriptors
call codes_get(ibufr,'bufrdcExpandedDescriptors',descriptors)
do i=1,size(descriptors)
write(*,*) ' ',i,descriptors(i)
enddo
! ---- array of real ----------------
! get the exapanded data values
call codes_get(ibufr,'numericValues',values)
do i=1,size(values)string
key = 'typicalDate'
try:
print(' %s: %s' % (key, codes_get(bufr, key)))
except CodesInternalError as err:
print('Error with key="%s" : %s' % (key, err.msg))
# --------------------------------
# get values for an array
# --------------------------------
# Native type integer
key = 'bufrdcExpandedDescriptors'
# get size
num = codes_get_size(bufr, key)
print(' size of %s is: %s' % (key, num))
# get values
values = codes_get_array(bufr, key)
for i in range(len(values)):
print(" %d %06d" % (i + 1, values[i]))
# Native type float
key = 'numericValues'
# get size
num = codes_get_size(bufr, key)
print(' size of %s is: %s' % (key, num))
# get values
values = codes_get_array(bufr, key)
for i in range(len(values)):
print(" %d %.10e" % (i + 1, values[i]))
cnt += 1
write(*,*) ' ',i,values(i)
# delete handle
enddo
codes_release(bufr)!#getcloseasthecharacterfilecall codes_get(ibufr,'typicalDate',typicalDate)
write(*,*) ' typicalDate:',typicalDate
f.close()
def main():
try:
example()!exceptfreeCodesInternalErrorarraysaserr:deallocate(values)
deallocate(descriptors)
if VERBOSE:
!releasethe bufrmessage
callcodestraceback.print_release(ibufrexc(file=sys.stderr)
!loadthenextbufr messageelse:callcodes_bufr_new_from_file(ifile,ibufr,iret)
count=count+1
sys.stderr.write(err.msg + '\n')
enddo
!closefilereturn1
if call codes_close_file(ifile)
end program bufr_get_keys__name__ == "__main__":
sys.exit(main())
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PythonC
Code Block
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pythoncpp
title
bufr_get_keys.pyc
linenumbers
false
#/*
* (C) 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
* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
*/
/*
* C Implementation: bufr_get_keys
*
* Description: how to read values of different type of keys from BUFR messages.
*
*/
#include "eccodes.h"
int main(int argc,char* argv[])
{
FILE* in = NULL;
/* message handle. Required in all the eccodes calls acting on a message.*/
codes_handle* h=NULL;
long *descriptors=NULL;
double *values = NULL;
char* typicalDate= NULL;
long longVal;
double doubleVal;
size_t values_len=0, desc_len=0, len=0;
int i, err=0;
int cnt=0;
const char* infile = "../../data/bufr/syno_multi.bufr";
in=fopen(infile,"rb");
if (!in) {print printf("messageERROR: %s"unable%tocnt
openfile%s\n", infile);
#weneedtoinstructecCodesreturnto1;
expandallthedescriptors}
/*loopoverthe# i.e. unpack the data valuesmessages in the bufr file */while((h= codes_set(gid,'unpack',1)
#----------------------------------------------_handle_new_from_file(NULL, in, PRODUCT_BUFR, &err)) != NULL || err != CODES_SUCCESS){
#getvaluesforkeysifholding(ha==singleNULL)value{#----------------------------------------------
printf("Error:unabletocreatehandle#Nativefortype integermessage %d\n",cnt);key='blockNumber'
cnt++;
try:continue;}
print'%s: %s' % (key,codes_get(gid,key))printf("message: %d\n",cnt);
except CodesInternalError,err:
print 'Error with key="%s" : %s' % (key,err.msg)
/* we need to instruct ecCodes to expand the descriptors
i.e. unpack the data values */#Native type integerCODES_CHECK(codes_set_long(h, "unpack", 1),0);
key='stationNumber'
try:/* read and print some data values */
/*longvalue*/
print'%s:%s'%CODES_CHECK(key,codes_get_long(gidh,key))
except CodesInternalError,err: "blockNumber", &longVal),0);printf(" print 'Error with key="%s" : %s' % (key,err.msg) blockNumber: %ld\n", longVal);#Native type float/* long value */key='airTemperatureAt2M'
CODES_CHECK(codes_get_long(h, "stationNumber", &longVal),0);
printf(" stationNumber: try:%ld\n", longVal);
/*doublevalue*/
print'%s:%s'%CODES_CHECK(key,codes_get_double(gidh,key))
except CodesInternalError,err:
print 'Error with key="%s" : %s' % (key,err.msg) "airTemperatureAt2M", &doubleVal),0);
printf(" airTemperatureAt2M: %f\n", doubleVal);#Native type string/* ---- string value -----------------*/
key='typicalDate'
/* get the size and allocate memory*/
try:
CODES_CHECK(codes_get_length(h,"typicalDate",&len),0);
print'%s:%s'typicalDate%= (key,codes_get(gid,key))
char*)malloc(len*sizeof(char));
/* get thevalues*/
exceptCodesInternalError,err:
codes_get_string(h,"typicalDate",typicalDate,&len);
print'Errorwithkey="%s" printf(" typicalDate: %s' % (key,err.msg) \n", typicalDate);#/* ----------------- array of long ----------------*/#/* get valuestheforsizeanandarray
#---------------------------------allocate memory*/# Native type integer
CODES_CHECK(codes_get_size(h, "bufrdcExpandedDescriptors", &desc_len),0);
descriptorskey='bufrdcExpandedDescriptors'= (long*)malloc(desc_len*sizeof(long));#/* get size the values */num=codes_get_size(gid,key)CODES_CHECK(codes_get_long_array(h, "bufrdcExpandedDescriptors", descriptors, &desc_len),0);printprintf("' size of %s is: %s' % (key,num)
bufrdcExpandedDescriptors:\n");
#for(iget=values
0;i< values=codes_get_array(gid,keydesc_len; i++)
for i in xrange(len(values)):{print printf(" %d %06d" % (i+1,values%ld\n",descriptors[i]); }
/* ----arrayof# Native type floatdouble ---------------*/
key='numericValues'
# get size/* get the size and allocate memory*/num=CODES_CHECK(codes_get_size(gid,key)
print ' size of %s is: %s' % (key,num)h, "numericValues", &values_len),0);
values = (double*)malloc(values_len*sizeof(double));#/* get the values*/values=CODES_CHECK(codes_get_double_array(gid,key)h, "numericValues", values, &values_len),0);forprintf("i in xrange(len(values)): numericValues:\n");for(i=0;iprint " %d %.10e" % (i+1,values[i])
< values_len; i++)
cnt+=1
{
#deletehandle
printf("%.10e\n",values[i]);
codes_release(gid)
#}
closethefile
f.close()
def main():
try: /* free allocated arrays */examplefree(descriptors);except CodesInternalError,err: free(values);if VERBOSE:free(typicalDate);
/*delete traceback.print_exc(file=sys.stderr)handle */else:codes_handle_delete(h);
cnt++;
print >>sys.stderr,err.msg}fclose(in);
return 1
if __name__ == "__main__":
sys.exit(main())0;
}