eccodes/examples/python/grib_get_keys.py

67 lines
1.6 KiB
Python

# Copyright 2005-2016 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/reduced_latlon_surface.grib1'
VERBOSE = 1 # verbose error reporting
def example():
f = open(INPUT)
keys = [
'Ni',
'Nj',
'latitudeOfFirstGridPointInDegrees',
'longitudeOfFirstGridPointInDegrees',
'latitudeOfLastGridPointInDegrees',
'longitudeOfLastGridPointInDegrees',
]
while 1:
gid = codes_grib_new_from_file(f)
if gid is None:
break
for key in keys:
try:
print ' %s: %s' % (key, codes_get(gid, key))
except CodesInternalError, err:
print 'Error with key="%s" : %s' % (key, err.msg)
print 'There are %d values, average is %f, min is %f, max is %f' % (
codes_get_size(gid, 'values'),
codes_get(gid, 'average'),
codes_get(gid, 'min'),
codes_get(gid, 'max')
)
codes_release(gid)
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())