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

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  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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#108073

Chris Angelico writes:

> On Tue, May 3, 2016 at 9:25 PM, Jussi Piitulainen 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.

Not sure. I may have misunderstood what this discussion is about - I
thought you had forgotten that Python has this function :)

>>>> "\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.

I missed the relevance of that analogy.

Ceterum censeo, the only suggested use for .swapcase I've ever heard of
is encryption.

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#108109

On Wed, 4 May 2016 12:42 am, Jussi Piitulainen wrote:

> Ceterum censeo, the only suggested use for .swapcase I've ever heard of
> is encryption.

iF YOU'RE PROGRAMMING AN EDITOR, sWAP cASE IS REALLY USEFUL FOR THOSE LITTLE
capslock ACCIDENTS THAT PLAGUE TYPISTS.



-- 
Steven

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#108121

Jussi Piitulainen wrote:
> Ceterum censeo, the only suggested use for .swapcase I've ever heard of
> is encryption.

Yep, all the smart terrorists these days are using a
combination of swapcase and rot13. Totally bamboozles
the FBI.

-- 
Greg

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#108123

On Wednesday 04 May 2016 18:34, Gregory Ewing wrote:

> Jussi Piitulainen wrote:
>> Ceterum censeo, the only suggested use for .swapcase I've ever heard of
>> is encryption.
> 
> Yep, all the smart terrorists these days are using a
> combination of swapcase and rot13. Totally bamboozles
> the FBI.
> 


Heh, the Australian government is getting their panties in a twist over the 
whole encryption thing, because Apple versus FBI proves that encryption is 
evil or something. Which lead to this exchange in the IRC channel we use at 
work:

(handles have been removed to anonymize the discussion)

XXXX: newsflash, most criminals are too stupid to use encryption
XXXX: https://en.wikipedia.org/wiki/Mujahedeen_Secrets
XXXX: It's hilarious, they turn off all the "western" ciphers
YYYY: the great thing about Mujahedeen Secrets (apart fromt he crypto 
apparently being poor) is the cyphertext is trivially detectable
YYYY: like "-----BEGIN PGP MESSAGE-----" but it's "-----DEATH TO 
INFIDELS-----" or something
YYYY: so XKeyscore can just go "this person is using Mujahedeen Secrets" in 
their regular traffic matching
ZZZZ: Wait, Mujahedeen Secrets was released anonymously, it has easily 
broken encryption and is trivially detectable? Can you say "schmuck bait"? I 
think I know who the authors were... 



-- 
Steve

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