Jeff McNeil wrote:
> The raw_input built-in returns a string. The '[0]' subscript returns
> the first character in the user supplied response as strings support
> indexing.
>
> [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> mystr = "asdf"
>>>> mystr[0]
> 'a'
>
>>>> raw_input("Another one, please: ")[0]
> Another one, please: ASDF
> 'A'
>
> -Jeff
>
> On 7/13/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>> what does the statement "choice = raw_input(prompt)[0]" mean? I don't
>> know why there is a '[0]' in the statement.
>>
Of course it's not a very good way to handle input from a "defensive
programming" point of view, since it fails and raises an exception when
the user hits return:
>>> a = raw_input("Bzzzt:")[0]
Bzzzt:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
IndexError: string index out of range
>>>
The best way to learn Python is to spend time typing it in to an
interactive interpreter session.
regards
Steve
--
Steve Holden +1 571 484 6266 +1 800 494 3119
Holden Web LLC/Ltd http://www.holdenweb.com
Skype: holdenweb http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------
--
http://mail.python.org/mailman/listinfo/python-list
