Just use an explanatory user tip that states it should be case sensitive, just like with most sites, or apps.
On Fri, Jul 19, 2013 at 9:13 PM, Chris Angelico <ros...@gmail.com> wrote: > On Sat, Jul 20, 2013 at 11:04 AM, Devyn Collier Johnson > <devyncjohn...@gmail.com> wrote: > > > > On 07/19/2013 07:09 PM, Dave Angel wrote: > >> > >> On 07/19/2013 06:08 PM, Devyn Collier Johnson wrote: > >>> > >>> > >>> On 07/19/2013 01:59 PM, Steven D'Aprano wrote: > >> > >> > >> <snip> > >>> > >>> > >>> As for the case-insensitive if-statements, most code uses Latin > letters. > >>> Making a case-insensitive-international if-statement would be > >>> interesting. I can tackle that later. For now, I only wanted to take > >>> care of Latin letters. I hope to figure something out for all > characters. > >>> > >> > >> Once Steven gave you the answer, what's to figure out? You simply use > >> casefold() instead of lower(). The only constraint is it's 3.3 and > later, > >> so you can't use it for anything earlier. > >> > >> http://docs.python.org/3.3/library/stdtypes.html#str.casefold > >> > >> """ > >> str.casefold() > >> Return a casefolded copy of the string. Casefolded strings may be used > for > >> caseless matching. > >> > >> Casefolding is similar to lowercasing but more aggressive because it is > >> intended to remove all case distinctions in a string. For example, the > >> German lowercase letter 'ß' is equivalent to "ss". Since it is already > >> lowercase, lower() would do nothing to 'ß'; casefold() converts it to > "ss". > >> > >> The casefolding algorithm is described in section 3.13 of the Unicode > >> Standard. > >> > >> New in version 3.3. > >> """ > >> > > Chris Angelico said that casefold is not perfect. In the future, I want > to > > make the perfect international-case-insensitive if-statement. For now, my > > code only supports a limited range of characters. Even with casefold, I > will > > have some issues as Chris Angelico mentioned. Also, "ß" is not really the > > same as "ss". > > Well, casefold is about as good as it's ever going to be, but that's > because "the perfect international-case-insensitive comparison" is a > fundamentally impossible goal. Your last sentence hints as to why; > there is no simple way to compare strings containing those characters, > because the correct treatment varies according to context. > > Your two best options are: Be case sensitive (and then you need only > worry about composition and combining characters and all those > nightmares - the ones you have to worry about either way), or use > casefold(). Of those, I prefer the first, because it's safer; the > second is also a good option. > > ChrisA > -- > http://mail.python.org/mailman/listinfo/python-list > -- Best Regards, David Hutto *CEO:* *http://www.hitwebdevelopment.com*
-- http://mail.python.org/mailman/listinfo/python-list
