Stefan Behnel writes:
> Hallvard B Furuseth, 11.10.2010 23:45:
>> If there were a __plain_str__() method which was supposed to fail rather
>> than start to babble Python syntax, and if there were not plenty of
>> Python code around which invoked __str__, I'd agree.
>
> Yes, calling str() "just in
Hallvard B Furuseth, 11.10.2010 23:45:
If there were a __plain_str__() method which was supposed to fail rather
than start to babble Python syntax, and if there were not plenty of
Python code around which invoked __str__, I'd agree.
Yes, calling str() "just in case" has a clear code smell. I th
On Mon, 11 Oct 2010 21:50:32 +0200
Hallvard B Furuseth wrote:
>
> I'd just posted an example in article :
>
> urllib.parse.urlunparse(('', '', '/foo', b'bar', '', '')) returns
> "/foo;b'bar'" instead of raising an exception or returning 2.6's correct
> "/foo;bar".
Oh, this looks like a bug in u
Stefan Behnel writes:
>Hallvard B Furuseth, 11.10.2010 21:50:
>> Fine, so programs will have to do it themselves...
>
> Yes, they can finally handle bytes and Unicode data correctly and
> safely. Having byte data turn into Unicode strings unexpectedly makes
> the behaviour of your code hardly predi
Terry Reedy writes:
>On 10/8/2010 9:45 AM, Hallvard B Furuseth wrote:
>>> Actually, the implicit contract of __str__ is that it never fails, so
>>> that everything can be printed out (for debugging purposes, etc.).
>>
>> Nope:
>>
>> $ python2 -c 'str(u"\u1000")'
>> Traceback (most recent call last)
Hallvard B Furuseth, 11.10.2010 21:50:
Antoine Pitrou writes:
2) some unicode objects didn't have a succesful str()
Python 3 fixes both these issues. Fixing 1) means there's no automatic
coercion when trying to mix bytes and unicode.
Fine, so programs will have to do it themselves...
Yes, t
Antoine Pitrou writes:
>Hallvard B Furuseth wrote:
>>Antoine Pitrou writes:
>>>Hallvard B Furuseth wrote:
The offender is bytes.__str__: str(b'foo') == "b'foo'".
It's often not clear from looking at a piece of code whether
some data is treated as strings or bytes, particularly when
Terry Reedy writes:
>On 10/8/2010 9:31 AM, Hallvard B Furuseth wrote:
>> That's not the point - the point is that for 2.* code which _uses_ str
>> vs unicode, the equivalent 3.* code uses str vs bytes. Yet not the
>> same way - a 2.* 'str' will sometimes be 3.* bytes, sometime str. So
>> upgraded
On 10/8/2010 9:31 AM, Hallvard B Furuseth wrote:
That's not the point - the point is that for 2.* code which _uses_ str
vs unicode, the equivalent 3.* code uses str vs bytes. Yet not the
same way - a 2.* 'str' will sometimes be 3.* bytes, sometime str. So
upgraded old code will have to expect
On 10/8/2010 9:45 AM, Hallvard B Furuseth wrote:
Actually, the implicit contract of __str__ is that it never fails, so
that everything can be printed out (for debugging purposes, etc.).
Nope:
$ python2 -c 'str(u"\u1000")'
Traceback (most recent call last):
File "", line 1, in ?
UnicodeEnco
On Fri, 08 Oct 2010 15:45:58 +0200
Hallvard B Furuseth wrote:
> Antoine Pitrou writes:
> >Hallvard B Furuseth wrote:
> >> The offender is bytes.__str__: str(b'foo') == "b'foo'".
> >> It's often not clear from looking at a piece of code whether
> >> some data is treated as strings or bytes, partic
Steven D'Aprano writes:
>On Fri, 08 Oct 2010 15:31:27 +0200, Hallvard B Furuseth wrote:
>> That's not the point - the point is that for 2.* code which _uses_ str
>> vs unicode, the equivalent 3.* code uses str vs bytes. Yet not the same
>> way - a 2.* 'str' will sometimes be 3.* bytes, sometime st
On Fri, 08 Oct 2010 15:31:27 +0200, Hallvard B Furuseth wrote:
> Arnaud Delobelle writes:
>>Hallvard B Furuseth writes:
>>> I've been playing a bit with Python3.2a2, and frankly its charset
>>> handling looks _less_ safe than in Python 2. (...)
>>> With 2. conversion Unicode <-> string the equiva
Antoine Pitrou writes:
>Hallvard B Furuseth wrote:
>> The offender is bytes.__str__: str(b'foo') == "b'foo'".
>> It's often not clear from looking at a piece of code whether
>> some data is treated as strings or bytes, particularly when
>> translating from old code. Which means one cannot see fro
Arnaud Delobelle writes:
>Hallvard B Furuseth writes:
>> I've been playing a bit with Python3.2a2, and frankly its charset
>> handling looks _less_ safe than in Python 2.
>> (...)
>> With 2. conversion Unicode <-> string the equivalent operation did
>> not silently produce garbage: it raised Unico
On Thu, 07 Oct 2010 23:33:35 +0200
Hallvard B Furuseth wrote:
>
> The offender is bytes.__str__: str(b'foo') == "b'foo'".
> It's often not clear from looking at a piece of code whether
> some data is treated as strings or bytes, particularly when
> translating from old code. Which means one cann
Hallvard B Furuseth writes:
> I've been playing a bit with Python3.2a2, and frankly its charset
> handling looks _less_ safe than in Python 2.
>
> The offender is bytes.__str__: str(b'foo') == "b'foo'".
> It's often not clear from looking at a piece of code whether
> some data is treated as strin
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