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
|
# -*- coding: utf-8 -*-
from __future__ import absolute_import, print_function, division
from tempfile import NamedTemporaryFile
from petl.compat import pickle
from petl.test.helpers import ieq
from petl.io.pickle import frompickle, topickle, appendpickle
def picklereader(fl):
try:
while True:
yield pickle.load(fl)
except EOFError:
pass
def test_frompickle():
f = NamedTemporaryFile(delete=False)
table = (('foo', 'bar'),
('a', 1),
('b', 2),
('c', 2))
for row in table:
pickle.dump(row, f)
f.close()
actual = frompickle(f.name)
ieq(table, actual)
ieq(table, actual) # verify can iterate twice
def test_topickle_appendpickle():
# exercise function
table = (('foo', 'bar'),
('a', 1),
('b', 2),
('c', 2))
f = NamedTemporaryFile(delete=False)
topickle(table, f.name)
# check what it did
with open(f.name, 'rb') as o:
actual = picklereader(o)
ieq(table, actual)
# check appending
table2 = (('foo', 'bar'),
('d', 7),
('e', 9),
('f', 1))
appendpickle(table2, f.name)
# check what it did
with open(f.name, 'rb') as o:
actual = picklereader(o)
expect = (('foo', 'bar'),
('a', 1),
('b', 2),
('c', 2),
('d', 7),
('e', 9),
('f', 1))
ieq(expect, actual)
def test_topickle_headerless():
table = []
f = NamedTemporaryFile(delete=False)
topickle(table, f.name)
expect = []
with open(f.name, 'rb') as o:
ieq(expect, picklereader(o))
|
