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Groups > comp.lang.python > #20811 > unrolled thread
| Started by | Rick Johnson <rantingrickjohnson@gmail.com> |
|---|---|
| First post | 2012-02-24 05:37 -0800 |
| Last post | 2012-02-26 13:19 +0000 |
| Articles | 1 on this page of 41 — 17 participants |
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PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 05:37 -0800
Re: PyWart: Language missing maximum constant of numeric types! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-02-24 13:55 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 06:14 -0800
Re: PyWart: Language missing maximum constant of numeric types! Neil Cerutti <neilc@norwich.edu> - 2012-02-24 14:25 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 07:25 -0800
Re: PyWart: Language missing maximum constant of numeric types! Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-02-24 12:32 -0500
Re: PyWart: Language missing maximum constant of numeric types! Ian Kelly <ian.g.kelly@gmail.com> - 2012-02-24 18:26 -0700
Re: PyWart: Language missing maximum constant of numeric types! Miki Tebeka <miki.tebeka@gmail.com> - 2012-02-24 06:39 -0800
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 07:18 -0800
Re: PyWart: Language missing maximum constant of numeric types! Mel Wilson <mwilson@the-wire.com> - 2012-02-24 10:21 -0500
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-24 15:31 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 07:34 -0800
Re: PyWart: Language missing maximum constant of numeric types! Michael Torrie <torriem@gmail.com> - 2012-02-24 09:23 -0700
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-24 22:45 +0000
Re: PyWart: Language missing maximum constant of numeric types! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-02-24 16:59 +0000
Re: PyWart: Language missing maximum constant of numeric types! Michael Torrie <torriem@gmail.com> - 2012-02-24 16:16 -0700
Re: PyWart: Language missing maximum constant of numeric types! Chris Angelico <rosuav@gmail.com> - 2012-02-25 11:09 +1100
Re: PyWart: Language missing maximum constant of numeric types! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-02-25 00:35 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-25 12:25 -0800
Re: PyWart: Language missing maximum constant of numeric types! MRAB <python@mrabarnett.plus.com> - 2012-02-25 00:37 +0000
Re: PyWart: Language missing maximum constant of numeric types! Serhiy Storchaka <storchaka@gmail.com> - 2012-02-25 17:32 +0200
Re: PyWart: Language missing maximum constant of numeric types! Fayaz Yusuf Khan <fayaz.yusuf.khan@gmail.com> - 2012-02-25 06:52 +0530
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-25 01:50 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-25 12:29 -0800
Re: PyWart: Language missing maximum constant of numeric types! alex23 <wuwei23@gmail.com> - 2012-02-26 18:32 -0800
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-27 03:51 +0000
Re: PyWart: Language missing maximum constant of numeric types! Chris Angelico <rosuav@gmail.com> - 2012-02-27 14:59 +1100
Re: PyWart: Language missing maximum constant of numeric types! alex23 <wuwei23@gmail.com> - 2012-02-26 22:49 -0800
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-25 09:18 +0100
Re: PyWart: Language missing maximum constant of numeric types! MRAB <python@mrabarnett.plus.com> - 2012-02-25 17:54 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-25 12:35 -0800
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-26 14:16 +0100
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-26 14:38 +0100
Re: PyWart: Language missing maximum constant of numeric types! Arnaud Delobelle <arnodel@gmail.com> - 2012-02-26 13:44 +0000
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-26 13:50 +0000
Re: PyWart: Language missing maximum constant of numeric types! Neil Cerutti <neilc@norwich.edu> - 2012-02-27 12:25 +0000
Re: PyWart: Language missing maximum constant of numeric types! Jean-Michel Pichavant <jeanmichel@sequans.com> - 2012-02-27 12:55 +0100
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-26 12:56 +0100
Re: PyWart: Language missing maximum constant of numeric types! Chris Angelico <rosuav@gmail.com> - 2012-02-26 23:52 +1100
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-26 14:32 +0100
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-26 13:19 +0000
Page 3 of 3 — ← Prev page 1 2 [3]
| From | Steven D'Aprano <steve+comp.lang.python@pearwood.info> |
|---|---|
| Date | 2012-02-26 13:19 +0000 |
| Message-ID | <4f4a315b$0$29989$c3e8da3$5496439d@news.astraweb.com> |
| In reply to | #20888 |
On Sun, 26 Feb 2012 12:56:46 +0100, Wolfgang Meiners wrote:
> That means:
> if maxlength and (len(string) <= maxlength):
>
> is equivalent to
> if (maxlength is not None) and (len(string) <= maxlength):
>
> which is more complicated to type and -in my opinion- not so intuitive.
> But because it is equivalent, it is a matter of taste, what to use.
Incorrect. The two are *not* equivalent.
def test(maxlength, string):
flag1 = maxlength and (len(string) <= maxlength)
flag2 = (maxlength is not None) and (len(string) <= maxlength)
return bool(flag1), bool(flag2) # normalise to booleans
>>> test(0, '')
(False, True)
So the two forms will take opposite branches of the if statement when
maxlength is 0 and string is the empty string.
--
Steven
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