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
133
134
135
136
137
138
139
140
141
142
143
|
import collections
import itertools
import pathlib
import numpy as np
import pytest
import eccodes
SAMPLE_DATA_FOLDER = pathlib.Path(__file__).parent / "sample-data"
TEST_GRIB_DATA = SAMPLE_DATA_FOLDER / "tiggelam_cnmc_sfc.grib2"
TEST_GRIB_DATA2 = SAMPLE_DATA_FOLDER / "era5-levels-members.grib"
def test_filereader():
with eccodes.FileReader(TEST_GRIB_DATA) as reader:
count = len([None for _ in reader])
assert count == 7
def test_read_message():
with eccodes.FileReader(TEST_GRIB_DATA) as reader:
message = next(reader)
assert isinstance(message, eccodes.GRIBMessage)
def test_message_get():
dummy_default = object()
known_missing = "scaleFactorOfSecondFixedSurface"
with eccodes.FileReader(TEST_GRIB_DATA) as reader:
message = next(reader)
assert message.get("edition") == 2
assert message.get("nonexistent") is None
assert message.get("nonexistent", dummy_default) is dummy_default
assert message.get("centre", ktype=int) == 250
assert message.get("dataType:int") == 11
num_vals = message.get("numberOfValues")
assert message.get_size("values") == num_vals
vals = message.get("values")
assert len(vals) == num_vals
vals2 = message.data
assert np.all(vals == vals2)
assert message["Ni"] == 511
assert message["gridType:int"] == 0
with pytest.raises(KeyError):
message["invalid"]
# keys set as MISSING
assert message.is_missing(known_missing)
assert message.get(known_missing) is None
assert message.get(known_missing, dummy_default) is dummy_default
with pytest.raises(KeyError):
message[known_missing]
def test_message_set():
missing_key = "scaleFactorOfFirstFixedSurface"
with eccodes.FileReader(TEST_GRIB_DATA) as reader:
message = next(reader)
message.set("centre", "ecmf")
vals = np.arange(message.get("numberOfValues"), dtype=np.float32)
message.set_array("values", vals)
message.set_missing(missing_key)
assert message.get("centre") == "ecmf"
assert np.all(message.get("values") == vals)
assert message.is_missing(missing_key)
def test_message_iter():
with eccodes.FileReader(TEST_GRIB_DATA2) as reader:
message = next(reader)
keys = list(message)
assert len(keys) >= 192
assert keys[-1] == "7777"
assert "centre" in keys
assert "shortName" in keys
keys2 = list(message.keys())
assert keys == keys2
items = collections.OrderedDict(message.items())
assert list(items.keys()) == keys
assert items["shortName"] == "z"
assert items["centre"] == "ecmf"
values = list(message.values())
assert values[keys.index("shortName")] == "z"
assert values[keys.index("centre")] == "ecmf"
assert values[-1] == "7777"
def test_message_iter_missingvalues():
missing_key = "level"
with eccodes.FileReader(TEST_GRIB_DATA2) as reader:
message = next(reader)
message[missing_key] = 42
message.set_missing(missing_key)
assert missing_key not in set(message)
assert missing_key not in set(message.keys())
assert missing_key not in dict(message.items())
def test_message_copy():
with eccodes.FileReader(TEST_GRIB_DATA2) as reader:
message = next(reader)
message2 = message.copy()
assert list(message.keys()) == list(message2.keys())
def test_write_message(tmp_path):
with eccodes.FileReader(TEST_GRIB_DATA2) as reader1:
fname = tmp_path / "foo.grib"
written = []
with open(fname, "wb") as fout:
for message in itertools.islice(reader1, 15):
message.write_to(fout)
written.append(message)
with eccodes.FileReader(fname) as reader2:
for message1, message2 in itertools.zip_longest(written, reader2):
assert message1 is not None
assert message2 is not None
for key in [
"edition",
"centre",
"typeOfLevel",
"level",
"dataDate",
"stepRange",
"dataType",
"shortName",
"packingType",
"gridType",
"number",
]:
assert message1[key] == message2[key]
assert np.all(message1.data == message2.data)
def test_message_from_samples():
message = eccodes.GRIBMessage.from_samples("regular_ll_sfc_grib2")
assert message["edition"] == 2
assert message["gridType"] == "regular_ll"
assert message["levtype"] == "sfc"
|
