Re: strftime() argument 1 must be str, not unicode

[Andrii V. Mishkovskyi]

2008/5/7 Alexandr N Zamaraev <to***@promsoft.ru>:

Subj is bag?

Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

>>from datetime import datetime
>>datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')

'2008_05_07 12_30_22.csv'

>>datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: strftime() argument 1 must be str, not unicode

Unicode and str objects are not the same. Why do you think that this
is a bug? Anyway, you can always use 'encode' method of unicode
objects:

In [2]: datetime.today().strftime('%Y-%m-%d %H-%M-%S.csv')
Out[2]: '2008-05-07 10-49-24.csv'

In [3]: datetime.today().strftime(u'%Y-%m-%d %H-%M-%S.csv')
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)

/home/mishok/doc/python/<ipython consolein <module>()

TypeError: strftime() argument 1 must be str, not unicode

In [4]: datetime.today().strftime(u'%Y-%m-%d %H-%M-%S.csv'.encode('utf-8'))
Out[4]: '2008-05-07 10-51-19.csv'

No offence, but have you read the tutorial?

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--
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.

[Tim Roberts]

"Andrii V. Mishkovskyi" <mi******@gmail.comwrote:

>2008/5/7 Alexandr N Zamaraev <to***@promsoft.ru>:

>Subj is bag?

Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

> >>from datetime import datetime
datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')

'2008_05_07 12_30_22.csv'

> >>datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: strftime() argument 1 must be str, not unicode

Unicode and str objects are not the same. Why do you think that this
is a bug?

I think that's a perfectly reasonable thing to expect. At the risk of
over-generalization, there is no good reason why, by this point in time,
all of the standard library routines that accept strings shouldn't also
accept Unicode strings.

It's the duck typing principle. Unicode strings look, walk, and talk like
regular strings. An error like this is not intuitive.
--
Tim Roberts, ti**@probo.com
Providenza & Boekelheide, Inc.

[Alexandr N Zamaraev]

Tim Roberts wrote:

I think that's a perfectly reasonable thing to expect. At the risk of
over-generalization, there is no good reason why, by this point in time,
all of the standard library routines that accept strings shouldn't also
accept Unicode strings.

However, file(fname), open(fname), os .*, os.path .*,
time.strftime(format) take unicode parameters.
See http://bugs.python.org/issue2782

[Andrii V. Mishkovskyi]

2008/5/8 Tim Roberts <ti**@probo.com>:

"Andrii V. Mishkovskyi" <mi******@gmail.comwrote:

>2008/5/7 Alexandr N Zamaraev <to***@promsoft.ru>:

Subj is bag?
>>
> Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
>(Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>from datetime import datetime
> >>datetime.today().strftime('%Y_%m_%d %H_%M_%S.csv')
> '2008_05_07 12_30_22.csv'
> >>datetime.today().strftime(u'%Y_%m_%d %H_%M_%S.csv')
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> TypeError: strftime() argument 1 must be str, not unicode

>

Unicode and str objects are not the same. Why do you think that this
>is a bug?

I think that's a perfectly reasonable thing to expect. At the risk of
over-generalization, there is no good reason why, by this point in time,
all of the standard library routines that accept strings shouldn't also
accept Unicode strings.

It's the duck typing principle. Unicode strings look, walk, and talk like
regular strings. An error like this is not intuitive.

On a second thought -- both of you (you and Alexander) are right. I
changed mind and posted a bug on Roundup already (bug #2782).

--
Tim Roberts, ti**@probo.com
Providenza & Boekelheide, Inc.
--
http://mail.python.org/mailman/listinfo/python-list

--
Wbr, Andrii Mishkovskyi.

He's got a heart of a little child, and he keeps it in a jar on his desk.