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Patch # 1033 by Adam Hupp: 

1) tempfile.TemporaryFile, NamedTemporaryFile, and SpooledTemporaryFile
    now pass newline and encoding to the underlying io.open call.
 2) test_tempfile is updated
 3) test_csv is updated to use the new arguments.
This commit is contained in:
Guido van Rossum 2007-08-28 03:29:45 +00:00
parent a1a68521db
commit f0c7416157
3 changed files with 76 additions and 40 deletions
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41
Lib/tempfile.py
View File

@ -406,13 +406,16 @@ class _TemporaryFileWrapper:
def __del__(self):
self.close()
def NamedTemporaryFile(mode='w+b', bufsize=-1, suffix="",
prefix=template, dir=None, delete=True):
def NamedTemporaryFile(mode='w+b', buffering=-1, encoding=None,
newline=None, suffix="", prefix=template,
dir=None, delete=True):
"""Create and return a temporary file.
Arguments:
'prefix', 'suffix', 'dir' -- as for mkstemp.
'mode' -- the mode argument to os.fdopen (default "w+b").
'bufsize' -- the buffer size argument to os.fdopen (default -1).
'mode' -- the mode argument to io.open (default "w+b").
'buffering' -- the buffer size argument to io.open (default -1).
'encoding' -- the encoding argument to io.open (default None)
'newline' -- the newline argument to io.open (default None)
'delete' -- whether the file is deleted on close (default True).
The file is created as mkstemp() would do it.
@ -435,7 +438,9 @@ def NamedTemporaryFile(mode='w+b', bufsize=-1, suffix="",
flags |= _os.O_TEMPORARY
(fd, name) = _mkstemp_inner(dir, prefix, suffix, flags)
file = _io.open(fd, mode, bufsize)
file = _io.open(fd, mode, buffering=buffering,
newline=newline, encoding=encoding)
return _TemporaryFileWrapper(file, name, delete)
if _os.name != 'posix' or _os.sys.platform == 'cygwin':
@ -444,13 +449,16 @@ if _os.name != 'posix' or _os.sys.platform == 'cygwin':
TemporaryFile = NamedTemporaryFile
else:
def TemporaryFile(mode='w+b', bufsize=-1, suffix="",
prefix=template, dir=None):
def TemporaryFile(mode='w+b', buffering=-1, encoding=None,
newline=None, suffix="", prefix=template,
dir=None):
"""Create and return a temporary file.
Arguments:
'prefix', 'suffix', 'dir' -- as for mkstemp.
'mode' -- the mode argument to os.fdopen (default "w+b").
'bufsize' -- the buffer size argument to os.fdopen (default -1).
'mode' -- the mode argument to io.open (default "w+b").
'buffering' -- the buffer size argument to io.open (default -1).
'encoding' -- the encoding argument to io.open (default None)
'newline' -- the newline argument to io.open (default None)
The file is created as mkstemp() would do it.
Returns an object with a file-like interface. The file has no
@ -468,7 +476,8 @@ else:
(fd, name) = _mkstemp_inner(dir, prefix, suffix, flags)
try:
_os.unlink(name)
return _io.open(fd, mode, bufsize)
return _io.open(fd, mode, buffering=buffering,
newline=newline, encoding=encoding)
except:
_os.close(fd)
raise
@ -480,15 +489,19 @@ class SpooledTemporaryFile:
"""
_rolled = False
def __init__(self, max_size=0, mode='w+b', bufsize=-1,
def __init__(self, max_size=0, mode='w+b', buffering=-1,
encoding=None, newline=None,
suffix="", prefix=template, dir=None):
if 'b' in mode:
self._file = _io.BytesIO()
else:
self._file = _io.StringIO()
self._file = _io.StringIO(encoding=encoding, newline=newline)
self._max_size = max_size
self._rolled = False
self._TemporaryFileArgs = (mode, bufsize, suffix, prefix, dir)
self._TemporaryFileArgs = {'mode': mode, 'buffering': buffering,
'suffix': suffix, 'prefix': prefix,
'encoding': encoding, 'newline': newline,
'dir': dir}
def _check(self, file):
if self._rolled: return
@ -499,7 +512,7 @@ class SpooledTemporaryFile:
def rollover(self):
if self._rolled: return
file = self._file
newfile = self._file = TemporaryFile(*self._TemporaryFileArgs)
newfile = self._file = TemporaryFile(**self._TemporaryFileArgs)
del self._TemporaryFileArgs
newfile.write(file.getvalue())

51
Lib/test/test_csv.py
View File

@ -2,6 +2,7 @@
# Copyright (C) 2001,2002 Python Software Foundation
# csv package unit tests
import io
import sys
import os
import unittest
@ -117,11 +118,11 @@ class Test_Csv(unittest.TestCase):
def _write_test(self, fields, expect, **kwargs):
with TemporaryFile("w+b") as fileobj:
with TemporaryFile("w+", newline='') as fileobj:
writer = csv.writer(fileobj, **kwargs)
writer.writerow(fields)
fileobj.seek(0)
self.assertEqual(str(fileobj.read()),
self.assertEqual(fileobj.read(),
expect + writer.dialect.lineterminator)
def test_write_arg_valid(self):
@ -188,12 +189,12 @@ class Test_Csv(unittest.TestCase):
writer = csv.writer(BrokenFile())
self.assertRaises(IOError, writer.writerows, [['a']])
with TemporaryFile("w+b") as fileobj:
with TemporaryFile("w+", newline='') as fileobj:
writer = csv.writer(fileobj)
self.assertRaises(TypeError, writer.writerows, None)
writer.writerows([['a','b'],['c','d']])
fileobj.seek(0)
self.assertEqual(fileobj.read(), b"a,b\r\nc,d\r\n")
self.assertEqual(fileobj.read(), "a,b\r\nc,d\r\n")
def _read_test(self, input, expect, **kwargs):
reader = csv.reader(input, **kwargs)
@ -332,11 +333,13 @@ class TestDialectRegistry(unittest.TestCase):
self.assertEqual(next(reader), ["c1ccccc1", "benzene"])
def compare_dialect_123(self, expected, *writeargs, **kwwriteargs):
with TemporaryFile("w+b") as fileobj:
with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj:
writer = csv.writer(fileobj, *writeargs, **kwwriteargs)
writer.writerow([1,2,3])
fileobj.seek(0)
self.assertEqual(str(fileobj.read()), expected)
self.assertEqual(fileobj.read(), expected)
def test_dialect_apply(self):
class testA(csv.excel):
@ -380,11 +383,11 @@ class TestCsvBase(unittest.TestCase):
self.assertEqual(fields, expected_result)
def writerAssertEqual(self, input, expected_result):
with TemporaryFile("w+b") as fileobj:
with TemporaryFile("w+", newline='') as fileobj:
writer = csv.writer(fileobj, dialect = self.dialect)
writer.writerows(input)
fileobj.seek(0)
self.assertEqual(str(fileobj.read()), expected_result)
self.assertEqual(fileobj.read(), expected_result)
class TestDialectExcel(TestCsvBase):
dialect = 'excel'
@ -513,11 +516,11 @@ class TestDictFields(unittest.TestCase):
### "long" means the row is longer than the number of fieldnames
### "short" means there are fewer elements in the row than fieldnames
def test_write_simple_dict(self):
with TemporaryFile("w+b") as fileobj:
with TemporaryFile("w+", newline='') as fileobj:
writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"])
writer.writerow({"f1": 10, "f3": "abc"})
fileobj.seek(0)
self.assertEqual(str(fileobj.read()), "10,,abc\r\n")
self.assertEqual(fileobj.read(), "10,,abc\r\n")
def test_write_no_fields(self):
fileobj = StringIO()
@ -614,45 +617,45 @@ class TestArrayWrites(unittest.TestCase):
contents = [(20-i) for i in range(20)]
a = array.array('i', contents)
with TemporaryFile("w+b") as fileobj:
with TemporaryFile("w+", newline='') as fileobj:
writer = csv.writer(fileobj, dialect="excel")
writer.writerow(a)
expected = ",".join([str(i) for i in a])+"\r\n"
fileobj.seek(0)
self.assertEqual(str(fileobj.read()), expected)
self.assertEqual(fileobj.read(), expected)
def test_double_write(self):
import array
contents = [(20-i)*0.1 for i in range(20)]
a = array.array('d', contents)
with TemporaryFile("w+b") as fileobj:
with TemporaryFile("w+", newline='') as fileobj:
writer = csv.writer(fileobj, dialect="excel")
writer.writerow(a)
expected = ",".join([str(i) for i in a])+"\r\n"
fileobj.seek(0)
self.assertEqual(str(fileobj.read()), expected)
self.assertEqual(fileobj.read(), expected)
def test_float_write(self):
import array
contents = [(20-i)*0.1 for i in range(20)]
a = array.array('f', contents)
with TemporaryFile("w+b") as fileobj:
with TemporaryFile("w+", newline='') as fileobj:
writer = csv.writer(fileobj, dialect="excel")
writer.writerow(a)
expected = ",".join([str(i) for i in a])+"\r\n"
fileobj.seek(0)
self.assertEqual(str(fileobj.read()), expected)
self.assertEqual(fileobj.read(), expected)
def test_char_write(self):
import array, string
a = array.array('u', string.ascii_letters)
with TemporaryFile("w+b") as fileobj:
with TemporaryFile("w+", newline='') as fileobj:
writer = csv.writer(fileobj, dialect="excel")
writer.writerow(a)
expected = ",".join(a)+"\r\n"
fileobj.seek(0)
self.assertEqual(str(fileobj.read()), expected)
self.assertEqual(fileobj.read(), expected)
class TestDialectValidity(unittest.TestCase):
def test_quoting(self):
@ -864,10 +867,8 @@ class TestUnicode(unittest.TestCase):
def test_unicode_read(self):
import io
fileobj = io.TextIOWrapper(TemporaryFile("w+b"), encoding="utf-16")
with fileobj as fileobj:
with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj:
fileobj.write(",".join(self.names) + "\r\n")
fileobj.seek(0)
reader = csv.reader(fileobj)
self.assertEqual(list(reader), [self.names])
@ -875,14 +876,12 @@ class TestUnicode(unittest.TestCase):
def test_unicode_write(self):
import io
with TemporaryFile("w+b") as fileobj:
encwriter = io.TextIOWrapper(fileobj, encoding="utf-8")
writer = csv.writer(encwriter)
with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj:
writer = csv.writer(fileobj)
writer.writerow(self.names)
expected = ",".join(self.names)+"\r\n"
fileobj.seek(0)
self.assertEqual(str(fileobj.read()), expected)
self.assertEqual(fileobj.read(), expected)

24
Lib/test/test_tempfile.py
View File

@ -746,6 +746,18 @@ class test_SpooledTemporaryFile(TC):
f.seek(0)
self.assertEqual(f.read(), "abc\ndef\nxyzzy\n")
def test_text_newline_and_encoding(self):
f = tempfile.SpooledTemporaryFile(mode='w+', max_size=10,
newline='', encoding='utf-8')
f.write("\u039B\r\n")
f.seek(0)
self.assertEqual(f.read(), "\u039B\r\n")
self.failIf(f._rolled)
f.write("\u039B" * 20 + "\r\n")
f.seek(0)
self.assertEqual(f.read(), "\u039B\r\n" + ("\u039B" * 20) + "\r\n")
self.failUnless(f._rolled)
test_classes.append(test_SpooledTemporaryFile)
@ -790,6 +802,18 @@ class test_TemporaryFile(TC):
self.failOnException("close")
# How to test the mode and bufsize parameters?
def test_mode_and_encoding(self):
def roundtrip(input, *args, **kwargs):
with tempfile.TemporaryFile(*args, **kwargs) as fileobj:
fileobj.write(input)
fileobj.seek(0)
self.assertEquals(input, fileobj.read())
roundtrip(b"1234", "w+b")
roundtrip("abdc\n", "w+")
roundtrip("\u039B", "w+", encoding="utf-16")
roundtrip("foo\r\n", "w+", newline="")
if tempfile.NamedTemporaryFile is not tempfile.TemporaryFile: