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Re: True == 1 weirdness

From Random832 <random832@fastmail.com>
References <mailman.30.1442580482.16376.python-list@python.org> <55fc0e4d$0$1645$c3e8da3$5496439d@news.astraweb.com>
Subject Re: True == 1 weirdness
Date 2015-09-18 09:40 -0400
Newsgroups comp.lang.python
Message-ID <mailman.32.1442583655.16376.python-list@python.org> (permalink)

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On Fri, Sep 18, 2015, at 09:14, Steven D'Aprano wrote:
> On Fri, 18 Sep 2015 10:47 pm, Random832 wrote:
> 
> > On Fri, Sep 18, 2015, at 08:30, Steven D'Aprano wrote:
> >> On Fri, 18 Sep 2015 07:26 am, Random832 wrote:
> >> 
> >> > I don't even think chaining should
> >> > work for all *actual* comparison operations.
> >> 
> >> I don't see why. Mathematicians chain comparisons all the time. If the
> >> language implements the same semantics as mathematicians already use, why
> >> do you dislike that?
> > 
> > Please provide a citation for this claim.
> 
> Really? You're disputing that chained comparisons are a standard maths
> notation?

I'm disputing that chained comparisons are used for the particular
combinations that I am actually arguing should not be used in python.
Such as a < b > c or a != b != c [whereas a may or may not be equal to
c] or a in b in c. Your claim seemed to be that these combinations *are*
used, since you claimed that python implements the *same* semantics.

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Thread

Re: True == 1 weirdness Random832 <random832@fastmail.com> - 2015-09-18 08:47 -0400
  Re: True == 1 weirdness Steven D'Aprano <steve@pearwood.info> - 2015-09-18 23:14 +1000
    Re: True == 1 weirdness Random832 <random832@fastmail.com> - 2015-09-18 09:40 -0400
      Re: True == 1 weirdness Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-09-19 19:19 +1200
    Re: True == 1 weirdness Terry Reedy <tjreedy@udel.edu> - 2015-09-18 14:24 -0400
    Re: True == 1 weirdness Random832 <random832@fastmail.com> - 2015-09-18 15:12 -0400
      Re: True == 1 weirdness Jussi Piitulainen <harvesting@makes.email.invalid> - 2015-09-19 09:23 +0300
    Re: True == 1 weirdness Ian Kelly <ian.g.kelly@gmail.com> - 2015-09-18 15:13 -0600
    Re: True == 1 weirdness Random832 <random832@fastmail.com> - 2015-09-18 17:21 -0400

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