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# -*- coding: utf-8 -*-
from __future__ import absolute_import, print_function, division
import gzip
import bz2
import zipfile
from tempfile import NamedTemporaryFile
from petl.compat import PY2
from petl.test.helpers import ieq, eq_
import petl as etl
from petl.io.sources import MemorySource, PopenSource, ZipSource, \
StdoutSource, GzipSource, BZ2Source
def test_memorysource():
tbl1 = (('foo', 'bar'),
('a', '1'),
('b', '2'),
('c', '2'))
# test writing to a string buffer
ss = MemorySource()
etl.tocsv(tbl1, ss)
expect = "foo,bar\r\na,1\r\nb,2\r\nc,2\r\n"
if not PY2:
expect = expect.encode('ascii')
actual = ss.getvalue()
eq_(expect, actual)
# test reading from a string buffer
tbl2 = etl.fromcsv(MemorySource(actual))
ieq(tbl1, tbl2)
ieq(tbl1, tbl2)
# test appending
etl.appendcsv(tbl1, ss)
actual = ss.getvalue()
expect = "foo,bar\r\na,1\r\nb,2\r\nc,2\r\na,1\r\nb,2\r\nc,2\r\n"
if not PY2:
expect = expect.encode('ascii')
eq_(expect, actual)
def test_memorysource_2():
data = 'foo,bar\r\na,1\r\nb,2\r\nc,2\r\n'
if not PY2:
data = data.encode('ascii')
actual = etl.fromcsv(MemorySource(data))
expect = (('foo', 'bar'),
('a', '1'),
('b', '2'),
('c', '2'))
ieq(expect, actual)
ieq(expect, actual)
def test_popensource():
expect = (('foo', 'bar'),)
delimiter = ' '
actual = etl.fromcsv(PopenSource(r'echo foo bar',
shell=True),
delimiter=delimiter)
ieq(expect, actual)
def test_zipsource():
# setup
tbl = [('foo', 'bar'), ('a', '1'), ('b', '2')]
fn_tsv = NamedTemporaryFile().name
etl.totsv(tbl, fn_tsv)
fn_zip = NamedTemporaryFile().name
z = zipfile.ZipFile(fn_zip, mode='w')
z.write(fn_tsv, 'data.tsv')
z.close()
# test
actual = etl.fromtsv(ZipSource(fn_zip, 'data.tsv'))
ieq(tbl, actual)
def test_stdoutsource():
tbl = [('foo', 'bar'), ('a', 1), ('b', 2)]
etl.tocsv(tbl, StdoutSource(), encoding='ascii')
etl.tohtml(tbl, StdoutSource(), encoding='ascii')
etl.topickle(tbl, StdoutSource())
def test_stdoutsource_none(capfd):
tbl = [('foo', 'bar'), ('a', 1), ('b', 2)]
etl.tocsv(tbl, encoding='ascii')
captured = capfd.readouterr()
outp = captured.out
# TODO: capfd works on vscode but not in console/tox
if outp:
assert outp in ( 'foo,bar\r\na,1\r\nb,2\r\n' , 'foo,bar\na,1\nb,2\n' )
def test_stdoutsource_unicode():
tbl = [('foo', 'bar'),
(u'Արամ Խաչատրյան', 1),
(u'Johann Strauß', 2)]
etl.tocsv(tbl, StdoutSource(), encoding='utf-8')
etl.tohtml(tbl, StdoutSource(), encoding='utf-8')
etl.topickle(tbl, StdoutSource())
def test_gzipsource():
# setup
tbl = [('foo', 'bar'), ('a', '1'), ('b', '2')]
fn = NamedTemporaryFile().name + '.gz'
expect = b"foo,bar\na,1\nb,2\n"
# write explicit
etl.tocsv(tbl, GzipSource(fn), lineterminator='\n')
actual = gzip.open(fn).read()
eq_(expect, actual)
# write implicit
etl.tocsv(tbl, fn, lineterminator='\n')
actual = gzip.open(fn).read()
eq_(expect, actual)
# read explicit
tbl2 = etl.fromcsv(GzipSource(fn))
ieq(tbl, tbl2)
# read implicit
tbl2 = etl.fromcsv(fn)
ieq(tbl, tbl2)
def test_bzip2source():
# setup
tbl = [('foo', 'bar'), ('a', '1'), ('b', '2')]
fn = NamedTemporaryFile().name + '.bz2'
expect = b"foo,bar\na,1\nb,2\n"
# write explicit
etl.tocsv(tbl, BZ2Source(fn), lineterminator='\n')
actual = bz2.BZ2File(fn).read()
eq_(expect, actual)
# write implicit
etl.tocsv(tbl, fn, lineterminator='\n')
actual = bz2.BZ2File(fn).read()
eq_(expect, actual)
# read explicit
tbl2 = etl.fromcsv(BZ2Source(fn))
ieq(tbl, tbl2)
# read implicit
tbl2 = etl.fromcsv(fn)
ieq(tbl, tbl2)
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