[Tutor] Error message...

[Rob Day]

On 23 August 2012 15:17, Victoria Homsy <victoriahomsy at yahoo.com> wrote:

>
> def isPalindrome(s):
>  if len(s) <= 1: return True
> else: return s(0) == s(-1) and isPalindrome (s[1:-1])
>
> I don't see why this wouldn't work...
>
> Many thanks in advance.
>
> Kind regards,
>
> Victoria
>

Parentheses are used for function arguments in Python, whereas square
brackets are used for slices - so the first character of s is not s(0) but
s[0].

When you say s(0) and s(-1), Python thinks you're calling s as a function
with 0 or -1 as the argument - hence, "str object is not callable".
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