[Python-Dev] [RELEASED] Python 3.4.0 release candidate 2 is now available
On behalf of the Python development team, I'm delighted to announce the second and final release candidate of Python 3.4. This is a preview release, and its use is not recommended for production settings. Python 3.4 includes a range of improvements of the 3.x series, including hundreds of smal
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 24 February 2014 08:56, Cameron Simpson wrote:> On 23Feb2014 22:56, Victor Stinner wrote:>>> An aid to debugging -- need to see what's what at that moment? Toss it>>> into %a. It is not intended for production code, but is included to>>> hopefully circumvent the inappropriate use of _
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
Glenn Linderman writes: > On 2/23/2014 2:25 PM, Antoine Pitrou wrote: >> On 2014年2月23日 14:14:55 -0800 Glenn Linderman >> wrote: >>> On 2/23/2014 1:37 PM, Antoine Pitrou wrote: And you certainly*don't* print debugging output into a wire protocol. >>> Web server applications do,
Re: [Python-Dev] PEP 463: Exception-catching expressions
On Mon, Feb 24, 2014 at 7:51 AM, Ethan Furman wrote:>> Yes. Augmented assignment is still assignment, so a statement. The only>> way to parse that is as>>>> x /= (y except ZeroDivisionError: 1)>>> Well, that is certainly not what I would have expected. I can see that you'd want to have tha
Re: [Python-Dev] PEP 463: Exception-catching expressions
23.02.2014 19:51, Stefan Behnel wrote: I see a risk of interfering with in-place assignment operators, e.g. x /= y except ZeroDivisionError: 1 might not do what one could expect, because (as I assume) it would behave differently from x = x / y except ZeroDivisionError: 1 [snip] Pl
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 2/23/2014 2:25 PM, Antoine Pitrou wrote: On 2014年2月23日 14:14:55 -0800 Glenn Linderman wrote: On 2/23/2014 1:37 PM, Antoine Pitrou wrote: And you certainly*don't* print debugging output into a wire protocol. Web server applications do, so they can be displayed in the browser. They m
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 2/23/2014 4:25 PM, Ethan Furman wrote:> I agree that having only one decimal format code would be nice, or even> two if the second one did something different, and that three seems> completely over the top -- unfortunately, Python 3.4 still supports all> three (%d, %i, and %u). Not supportin
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 2014年2月24日 08:54:08 +1000 Nick Coghlan wrote:>>> The idea being if we offer %a, folks won't be tempted to abuse> __bytes__.>>>> Which folks are we talking about? This sounds gratuitous.> > It's a harm containment tactic, based on the assumption people *will* want> to include th
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 23Feb2014 22:56, Victor Stinner wrote:>> An aid to debugging -- need to see what's what at that moment? Toss it>> into %a. It is not intended for production code, but is included to>> hopefully circumvent the inappropriate use of __bytes__ methods on classes.> > How do you plan to use
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 24 Feb 2014 07:39, "Antoine Pitrou" wrote:>> On 2014年2月23日 12:42:59 -0800> Ethan Furman wrote:>> On 02/23/2014 03:33 AM, Antoine Pitrou wrote:>>> On 2014年2月22日 17:56:50 -0800>>> Ethan Furman wrote:>>>>>>>> ``%a`` will call :func:``ascii()`` on the interpolated val
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 2014年2月23日 14:14:55 -0800 Glenn Linderman wrote:> On 2/23/2014 1:37 PM, Antoine Pitrou wrote:>> And you certainly*don't* print debugging output into a wire protocol.> > Web server applications do, so they can be displayed in the browser. They may embed debugging information into so
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 2/23/2014 1:37 PM, Antoine Pitrou wrote: And you certainly*don't* print debugging output into a wire protocol. Web server applications do, so they can be displayed in the browser. ___ Python-Dev mailing list [email protected] https://mail.pyth
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
>>>>>>> (You forgot "/U" representation (it's an antislah, but I don't>> see the key on my Mac keyboard?).)>>>> Hard to forget what you don't know. ;) Will ascii() ever emit an> antislash representation? Try ascii(chr(0x1f)). What is the use case of this *new* formatter? H
Re: [Python-Dev] PEP 463: Exception-catching expressions
On Mon, Feb 24, 2014 at 6:26 AM, Thomas Wouters wrote:>> I see a risk of interfering with in-place assignment operators, e.g.>>>> x /= y except ZeroDivisionError: 1>>>> might not do what one could expect, because (as I assume) it would behave>> differently from>>>> x = x / y except
Re: [Python-Dev] PEP 463: Exception-catching expressions
On 02/23/2014 11:26 AM, Thomas Wouters wrote: On Feb 23, 2014 7:52 PM, "Stefan Behnel" mailto:[email protected]>> wrote: Chris Angelico, 21.02.2014 04:15:> Just as PEP 308 introduced a means of value-based conditions in an> expression, this system allows exception-based conditions to be us
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 2014年2月23日 12:42:59 -0800 Ethan Furman wrote:> On 02/23/2014 03:33 AM, Antoine Pitrou wrote:>> On 2014年2月22日 17:56:50 -0800>> Ethan Furman wrote:>>>>>> ``%a`` will call :func:``ascii()`` on the interpolated value's >>> :func:``repr()``.>>> This is intended as a debuggi
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 02/23/2014 03:30 AM, Victor Stinner wrote: First, this is a warning in reST syntax: System Message: WARNING/2 (pep-0461.txt, line 53) Yup, fixed that. This area of programming is characterized by a mixture of binary data and ASCII compatible segments of text (aka ASCII-encoded text). B
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 02/23/2014 03:33 AM, Antoine Pitrou wrote: On 2014年2月22日 17:56:50 -0800 Ethan Furman wrote: ``%a`` will call :func:``ascii()`` on the interpolated value's :func:``repr()``. This is intended as a debugging aid, rather than something that should be used in production. Non-ascii values
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 02/22/2014 10:50 PM, Nikolaus Rath wrote: Ethan Furman writes: Example::>>> b'%4x' % 10 b' a'>>> '%#4x' % 10 ' 0xa'>>> '%04X' % 10 '000A' Shouldn't the second two examples also be bytes, ie. b'%#4x' instead of '%#4x'? Yup, thanks. -- ~Ethan~ _
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 02/23/2014 03:31 AM, Antoine Pitrou wrote: On 2014年2月22日 20:48:04 -0800 Ethan Furman wrote: All the numeric formatting codes (such as ``%x``, ``%o``, ``%e``, ``%f``, ``%g``, etc.) will be supported, and will work as they do for str, including the padding, justification and other relate
Re: [Python-Dev] PEP 463: Exception-catching expressions
On Feb 23, 2014 7:52 PM, "Stefan Behnel" wrote:>> Chris Angelico, 21.02.2014 04:15:>> Just as PEP 308 introduced a means of value-based conditions in an>> expression, this system allows exception-based conditions to be used>> as part of an expression.>> [...]>> This currently works::>
Re: [Python-Dev] PEP 463: Exception-catching expressions
Stefan Behnel, 23.02.2014 19:51:> Cython has typed> assignments, so a straight forward idea would be to handle TypeErrors in> assignments like this:> > cdef str s> s = x except TypeError: str(x) Similar code in Python would be this: from array import array x = array('i', [1,
Re: [Python-Dev] PEP 463: Exception-catching expressions
Chris Angelico, 21.02.2014 04:15:> Just as PEP 308 introduced a means of value-based conditions in an> expression, this system allows exception-based conditions to be used> as part of an expression.> [...]> This currently works::> > lst = [1, 2, None, 3]> value = lst[2] or "No value
[Python-Dev] [RELEASED] Python 3.3.5 release candidate 1
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On behalf of the Python development team, I'm happy to announce the release of Python 3.3.5, release candidate 1. Python 3.3.5 includes a fix for a regression in zipimport in 3.3.4 (see http://bugs.python.org/issue20621) and a few other bugs. Python
Re: [Python-Dev] PEP 463: Exception-catching expressions
On 2014年2月23日, Nick Coghlan wrote: Note that mandatory parentheses means we can duck the precedence question entirely, which I count as another point in favour of requiring them :) Careful, if you take that too far then Python 4 will have to be Scheme. ;-) Isaac Morland
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
Ethan Furman writes:> Example::>>>>> b'%4x' % 10>b' a'>>>>> '%#4x' % 10>' 0xa'>>>>> '%04X' % 10>'000A' Shouldn't the second two examples also be bytes, ie. b'%#4x' instead of '%#4x'? Best, -Nikolaus -- Encrypted emails preferred. PGP fingerprint: 5B93 61F8
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 23Feb2014 12:30, Victor Stinner wrote:>> All the numeric formatting codes (such as ``%x``, ``%o``, ``%e``, ``%f``,>> ``%g``, etc.) will be supported, and will work as they do for str, including>> the padding, justification and other related modifiers.> > IMO you should give the exhausti
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 23Feb2014 16:31, Nick Coghlan wrote:> On 23 February 2014 13:47, Cameron Simpson wrote:>> On 22Feb2014 17:56, Ethan Furman wrote:>>> Please let me know if anything else needs tweaking.>>> [...]>>> This area of programming is characterized by a mixture of binary data and>>> ASCII co
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
Hi, First, this is a warning in reST syntax: System Message: WARNING/2 (pep-0461.txt, line 53)> This area of programming is characterized by a mixture of binary data and> ASCII compatible segments of text (aka ASCII-encoded text). Bringing back a> restricted %-interpolation for ``bytes`` and
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 2014年2月22日 17:56:50 -0800 Ethan Furman wrote:> > ``%a`` will call :func:``ascii()`` on the interpolated value's > :func:``repr()``.> This is intended as a debugging aid, rather than something that should be used> in production. Non-ascii values will be encoded to either ``\xnn`` or
Re: [Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 2
On 2014年2月22日 20:48:04 -0800 Ethan Furman wrote:> On 02/22/2014 07:47 PM, Cameron Simpson wrote:>> On 22Feb2014 17:56, Ethan Furman wrote:>>> Please let me know if anything else needs tweaking.>>> [...]>>> This area of programming is characterized by a mixture of binary data and>
Re: [Python-Dev] One more cherry-pick request for 3.4.0 that I'd like a little public debate on
On 02/22/2014 03:27 AM, Antoine Pitrou wrote: On 2014年2月22日 01:42:57 -0600 Larry Hastings wrote: Victor has asked me to cherry-pick 180e4b678003: http://bugs.python.org/issue20320 (original issue) http://hg.python.org/cpython/rev/180e4b678003/ (checkin into trunk) http:/