Re: Not x.islower() has different output than x.isupper() in list output...

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From	Chris Angelico <rosuav@gmail.com>
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Subject	Re: Not x.islower() has different output than x.isupper() in list output...
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On Tue, May 3, 2016 at 9:25 PM, Jussi Piitulainen
<jussi.piitulainen@helsinki.fi> wrote:
> Chris Angelico writes:
>
>> This assumes, of course, that there is a function swapcase which can
>> return a string with case inverted. I'm not sure such a function
>> exists.
>
>    str.swapcase("foO")
>    'FOo'

I suppose for this discussion it doesn't matter if it's imperfect.

>>> "\N{ANGSTROM SIGN}".swapcase().swapcase() == "\N{ANGSTROM SIGN}"
False
>>> "\N{LATIN SMALL LETTER SHARP S}".swapcase().swapcase()
'ss'

But drawing the analogy with the negation of real numbers implies
something that doesn't exist.

ChrisA

Thread

Re: Not x.islower() has different output than x.isupper() in list output... Christopher Reimer <christopher_reimer@icloud.com> - 2016-04-29 18:55 -0700
  Re: Not x.islower() has different output than x.isupper() in list   output... Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-04-30 17:47 +1200
  Re: Not x.islower() has different output than x.isupper() in list output... pavlovevidence@gmail.com - 2016-05-03 03:00 -0700
    Re: Not x.islower() has different output than x.isupper() in list output... Chris Angelico <rosuav@gmail.com> - 2016-05-03 20:25 +1000
      Re: Not x.islower() has different output than x.isupper() in list output... Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-05-03 14:25 +0300
        Re: Not x.islower() has different output than x.isupper() in list output... Chris Angelico <rosuav@gmail.com> - 2016-05-03 22:00 +1000
          Re: Not x.islower() has different output than x.isupper() in list output... DFS <nospam@dfs.com> - 2016-05-03 09:01 -0400
            Re: Not x.islower() has different output than x.isupper() in list output... Chris Angelico <rosuav@gmail.com> - 2016-05-03 23:13 +1000
              Re: Not x.islower() has different output than x.isupper() in list output... DFS <nospam@dfs.com> - 2016-05-03 09:19 -0400
                Re: Not x.islower() has different output than x.isupper() in list output... Chris Angelico <rosuav@gmail.com> - 2016-05-03 23:23 +1000
                Re: Not x.islower() has different output than x.isupper() in list output... Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-05-03 17:49 +0300
                Re: Not x.islower() has different output than x.isupper() in list output... DFS <nospam@dfs.com> - 2016-05-03 11:12 -0400
                Re: Not x.islower() has different output than x.isupper() in list output... Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-05-03 18:27 +0300
                Re: Not x.islower() has different output than x.isupper() in list output... Grant Edwards <grant.b.edwards@gmail.com> - 2016-05-03 15:42 +0000
                Re: Not x.islower() has different output than x.isupper() in list output... Terry Reedy <tjreedy@udel.edu> - 2016-05-03 12:37 -0400
                Re: Not x.islower() has different output than x.isupper() in list output... Steven D'Aprano <steve@pearwood.info> - 2016-05-04 13:28 +1000
                Re: Not x.islower() has different output than x.isupper() in list output... DFS <nospam@dfs.com> - 2016-05-04 10:09 -0400
                Re: Not x.islower() has different output than x.isupper() in list output... Chris Angelico <rosuav@gmail.com> - 2016-05-05 00:37 +1000
                Re: Not x.islower() has different output than x.isupper() in list output... Steven D'Aprano <steve@pearwood.info> - 2016-05-05 01:37 +1000
                Re: Not x.islower() has different output than x.isupper() in list output... DFS <nospam@dfs.com> - 2016-05-04 17:05 -0400
          Re: Not x.islower() has different output than x.isupper() in list output... Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-05-03 17:42 +0300
            Re: Not x.islower() has different output than x.isupper() in list output... Steven D'Aprano <steve@pearwood.info> - 2016-05-04 11:30 +1000
            Re: Not x.islower() has different output than x.isupper() in list output... Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-05-04 20:34 +1200
              Re: Not x.islower() has different output than x.isupper() in list output... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-05-04 19:06 +1000

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