Is there any way to say ignore case with "in"?

[tinnews@isbd.co.uk]

Is there any way in python to say

if string1 in string2:
<do something>

ignoring the case of string1 and string2?


I know I could use:-

if lower(string1) in lower(string2):
<do something>

but it somehow feels there ought to be an easier (tidier?) way.

--
Chris Green

[Fredrik Lundh]

Re: Is there any way to say ignore case with &quot;in&quo t;?

tinnews@isbd.co .uk wrote:

Is there any way in python to say
>
if string1 in string2:
<do something>
>
ignoring the case of string1 and string2?

if string1.lower() in string2.lower() :
...

(there's no case-insensitive version of the "in" operator in stock Python)

</F>

[Torsten Bronger]

Re: Is there any way to say ignore case with &quot;in&quo t;?

Hallöchen!

tinnews@isbd.co .uk writes:

Is there any way in python to say
>
if string1 in string2:
<do something>
>
ignoring the case of string1 and string2?

You can "normalise" both first, i.e. converting to lower case.

Tschö,
Torsten.

--
Torsten Bronger, aquisgrana, europa vetus
Jabber ID: bronger@jabber. org
(See http://ime.webhop.org for further contact info.)

[7stud]

Re: Is there any way to say ignore case with &quot;in&quo t;?

On Apr 4, 2:43 pm, tinn...@isbd.co .uk wrote:

Is there any way in python to say
>
    if string1 in string2:
        <do something>
>
ignoring the case of string1 and string2?
>
I know I could use:-
>
    if lower(string1) in lower(string2):
        <do something>
>
but it somehow feels there ought to be an easier (tidier?) way.
>

Easier? You mean like some kind of mind meld?

[Steve Holden]

Re: Is there any way to say ignore case with &quot;in&quo t;?

7stud wrote:

On Apr 4, 2:43 pm, tinn...@isbd.co .uk wrote:

>Is there any way in python to say
>>
> if string1 in string2:
> <do something>
>>
>ignoring the case of string1 and string2?
>>
>I know I could use:-
>>
> if lower(string1) in lower(string2):
> <do something>
>>
>but it somehow feels there ought to be an easier (tidier?) way.
>>

>
Easier? You mean like some kind of mind meld?
>

That's right, DWIM mode Python. Rock on!

regards
Steve
--
Steve Holden +1 571 484 6266 +1 800 494 3119
Holden Web LLC http://www.holdenweb.com/

[Mel]

Re: Is there any way to say ignore case with &quot;in&quo t;?

Paul McGuire wrote:

On Apr 6, 8:53 am, "Martin v. Löwis" <mar...@v.loewi s.dewrote:

>>>I know I could use:-
>>> if lower(string1) in lower(string2):
>>> <do something>
>>>but it somehow feels there ought to be an easier (tidier?) way.

>Take, for example, U+017F, LATIN SMALL LETTER LONG S. It's .lower() is
>the same character, as the character is already in lower case.
>It's .upper() is U+0053, LATIN CAPITAL LETTER S. Notice that the LONG
>is gone - there is no upper-case version of a "long s".
>It's .upper().lower( ) is U+0073, LATIN SMALL LETTER S.
>>
>So should case-insensitive matching match the small s with the small
>long s, as they have the same upper-case letter?

[ ... ]

>>>[i for i in range(65536) if unichr(i).lower ().upper() !=

... unichr(i).upper ()]
[304, 1012, 8486, 8490, 8491]
>
Instead of 15 exceptions to the rule, conversion to upper has only 5
exceptions. So perhaps comparsion of upper's is, while not foolproof,
less likely to encounter these exceptions? Or at least, simpler to
code explicit tests.

I don't know what meaning is carried by all those differences in
lower-case glyphs. Converting to upper seems to fold together a lot
of variant pi's and rho's which I think would be roughly a good thing.
I seem to recall that the tiny iota (ypogegrammeni) has or had
grammatical significance. The other effect would be conflating
physics' Angstron unit and Kelvin unit signs with ring-a and K.
Applicaton programmers beware.

Mel.