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
|
# -*- coding: utf-8 -*-
""" Tablib - *SV Support.
"""
from tablib.compat import is_py3, csv, StringIO
title = 'csv'
extensions = ('csv',)
DEFAULT_ENCODING = 'utf-8'
DEFAULT_DELIMITER = ','
def export_set(dataset, **kwargs):
"""Returns CSV representation of Dataset."""
stream = StringIO()
kwargs.setdefault('delimiter', DEFAULT_DELIMITER)
if not is_py3:
kwargs.setdefault('encoding', DEFAULT_ENCODING)
_csv = csv.writer(stream, **kwargs)
for row in dataset._package(dicts=False):
_csv.writerow(row)
return stream.getvalue()
def import_set(dset, in_stream, headers=True, **kwargs):
"""Returns dataset from CSV stream."""
dset.wipe()
kwargs.setdefault('delimiter', DEFAULT_DELIMITER)
if not is_py3:
kwargs.setdefault('encoding', DEFAULT_ENCODING)
rows = csv.reader(StringIO(in_stream), **kwargs)
for i, row in enumerate(rows):
if (i == 0) and (headers):
dset.headers = row
else:
dset.append(row)
def detect(stream, delimiter=DEFAULT_DELIMITER):
"""Returns True if given stream is valid CSV."""
try:
csv.Sniffer().sniff(stream, delimiters=delimiter)
return True
except (csv.Error, TypeError):
return False
|
