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

[DFS]

On 5/3/2016 9:13 AM, Chris Angelico wrote:
> On Tue, May 3, 2016 at 11:01 PM, DFS <nospam at dfs.com> wrote:
>> On 5/3/2016 8:00 AM, Chris Angelico wrote:
>>>
>>> On Tue, May 3, 2016 at 9:25 PM, Jussi Piitulainen
>>> <jussi.piitulainen at 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.
>>
>>
>>
>> What was imperfect?
>
> It doesn't invert, the way numeric negation does.


What do you mean by 'case inverted'?

It looks like it swaps the case correctly between upper and lower.




> And if you try to
> define exactly what it does, you'll come right back to
> isupper()/islower(), so it's not much help in defining those.
>
> ChrisA