1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
# (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.
#
#
from __future__ import print_function
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, 'rb')
cnt = 0
# loop for the messages in the file
while 1:
# get handle for message
bufr = codes_bufr_new_from_file(f)
if bufr 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(bufr, 'unpack', 1)
# ---------------------------------------------
# get values for keys holding a single value
# ---------------------------------------------
# Native type integer
key = 'blockNumber'
try:
print(' %s: %s' % (key, codes_get(bufr, key)))
except CodesInternalError as err:
print('Error with key="%s" : %s' % (key, err.msg))
# Native type integer
key = 'stationNumber'
try:
print(' %s: %s' % (key, codes_get(bufr, key)))
except CodesInternalError as err:
print('Error with key="%s" : %s' % (key, err.msg))
assert codes_is_missing(bufr, key) == 0
# Native type float
key = 'airTemperatureAt2M'
try:
print(' %s: %s' % (key, codes_get(bufr, key)))
except CodesInternalError as err:
print('Error with key="%s" : %s' % (key, err.msg))
assert codes_is_missing(bufr, key) == 0
# Native type 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))
assert codes_is_missing(bufr, 'relativeHumidity') == 1
assert codes_is_missing(bufr, '#5#cloudAmount') == 1
# --------------------------------
# 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
# delete handle
codes_release(bufr)
# close the file
f.close()
def main():
try:
example()
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())
|
