eccodes/examples/python/count_messages.py

73 lines
1.7 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.
#
import traceback
import sys
from eccodes import *
INPUT = '../../data/tigge_pf_ecmwf.grib2'
VERBOSE = 1 # verbose error reporting
def example():
f = open(INPUT)
mcount = codes_count_in_file(f)
gid_list = [codes_grib_new_from_file(f) for i in range(mcount)]
f.close()
keys = [
'Ni',
'Nj',
'latitudeOfFirstGridPointInDegrees',
'longitudeOfFirstGridPointInDegrees',
'latitudeOfLastGridPointInDegrees',
'longitudeOfLastGridPointInDegrees',
'jDirectionIncrementInDegrees',
'iDirectionIncrementInDegrees',
]
for i in range(mcount):
gid = gid_list[i]
print "processing message number", i + 1
for key in keys:
print '%s=%g' % (key, codes_get(gid, key))
print 'There are %d, average is %g, min is %g, max is %g' % (
codes_get_size(gid, 'values'),
codes_get(gid, 'average'),
codes_get(gid, 'min'),
codes_get(gid, 'max')
)
print '-' * 100
codes_release(gid)
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())