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Groups > comp.lang.python > #56587
| Date | 2013-10-10 17:10 +0100 |
|---|---|
| From | MRAB <python@mrabarnett.plus.com> |
| Subject | Re: I am never going to complain about Python again |
| References | <52562ee3$0$2931$c3e8da3$76491128@news.astraweb.com> <roy-582B40.09094210102013@news.panix.com> <bbo0omFa53vU1@mid.individual.net> <l36ipg$kjt$1@dont-email.me> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.951.1381421409.18130.python-list@python.org> (permalink) |
On 10/10/2013 16:57, Rotwang wrote:
> On 10/10/2013 16:51, Neil Cerutti wrote:
>> [...]
>>
>> Mixed arithmetic always promotes to the wider type (except in
>> the case of complex numbers (Ha!)).
>>
>> r == c is equivalent to r == abs(c), which returns the magintude
>> of the complex number.
>
> What?
>
> >>> -1 == -1 + 0j
> True
> >>> -1 == abs(-1 + 0j)
> False
> >>> 1 == 0 + 1j
> False
> >>> 1 == abs(0 + 1j)
> True
>
Indeed.
If r is real (float) and c is complex:
r == c means r == c.real and c.imag == 0.0
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I am never going to complain about Python again Steven D'Aprano <steve@pearwood.info> - 2013-10-10 04:36 +0000
Re: I am never going to complain about Python again Chris Angelico <rosuav@gmail.com> - 2013-10-10 15:50 +1100
Re: I am never going to complain about Python again Chris Rebert <clp2@rebertia.com> - 2013-10-09 22:26 -0700
Re: I am never going to complain about Python again Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-10-10 06:39 +0100
Re: I am never going to complain about Python again Christian Gollwitzer <auriocus@gmx.de> - 2013-10-10 08:41 +0200
Re: I am never going to complain about Python again "Frank Millman" <frank@chagford.com> - 2013-10-10 10:23 +0200
Re: I am never going to complain about Python again MRAB <python@mrabarnett.plus.com> - 2013-10-10 12:10 +0100
Re: I am never going to complain about Python again Tim Chase <python.list@tim.thechases.com> - 2013-10-10 06:43 -0500
Re: I am never going to complain about Python again "Frank Millman" <frank@chagford.com> - 2013-10-10 13:44 +0200
Re: I am never going to complain about Python again Roy Smith <roy@panix.com> - 2013-10-10 09:09 -0400
Re: I am never going to complain about Python again Neil Cerutti <neilc@norwich.edu> - 2013-10-10 15:51 +0000
Re: I am never going to complain about Python again Rotwang <sg552@hotmail.co.uk> - 2013-10-10 16:57 +0100
Re: I am never going to complain about Python again MRAB <python@mrabarnett.plus.com> - 2013-10-10 17:10 +0100
Re: I am never going to complain about Python again Neil Cerutti <neilc@norwich.edu> - 2013-10-10 17:48 +0000
Re: I am never going to complain about Python again Ian Kelly <ian.g.kelly@gmail.com> - 2013-10-10 12:35 -0600
Re: I am never going to complain about Python again Neil Cerutti <neilc@norwich.edu> - 2013-10-10 18:49 +0000
Re: I am never going to complain about Python again Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-10-10 20:47 +0100
Re: I am never going to complain about Python again Neil Cerutti <neilc@norwich.edu> - 2013-10-10 19:54 +0000
Re: I am never going to complain about Python again Cameron Simpson <cs@zip.com.au> - 2013-10-11 08:52 +1100
Re: I am never going to complain about Python again Roy Smith <roy@panix.com> - 2013-10-10 20:07 -0400
Is this the room for an argument? John Ladasky <john_ladasky@sbcglobal.net> - 2013-10-10 21:26 -0700
Re: Is this the room for an argument? Roy Smith <roy@panix.com> - 2013-10-11 09:49 -0400
Re: I am never going to complain about Python again Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-10-11 02:23 +0000
Re: I am never going to complain about Python again Neil Cerutti <neilc@norwich.edu> - 2013-10-11 12:31 +0000
Re: I am never going to complain about Python again Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-10-10 20:09 -0400
Re: I am never going to complain about Python again Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-10-11 02:08 +0000
Re: I am never going to complain about Python again Joshua Landau <joshua@landau.ws> - 2013-10-11 09:17 +0100
Re: I am never going to complain about Python again Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-10-11 09:11 +0000
Re: I am never going to complain about Python again Chris Angelico <rosuav@gmail.com> - 2013-10-11 20:52 +1100
Re: I am never going to complain about Python again Joshua Landau <joshua@landau.ws> - 2013-10-11 17:56 +0100
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