questions? wrote:
> I want to do list index function.
>>>> y=['1','2','3','4']
>>>> y
> ['1', '2', '3', '4']
>>>> y.index['2']
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> TypeError: unsubscriptable object
>
> It works with y=[1,2,3,4]. Anyone has any hint, what's the reason
> here?
You're mixing things up badly. Either you want to call the function .index()
of the list object, in which case you don't use angle brackets but rather
round brackets (which works):
>>> y = ['1','2','3','4']
>>> y.index('2')
1
or you want to get an element at a specified position in the list, in which
case you don't use .index() but rather index the object using []:
>>> y = ['1','2','3','4']
>>> y[2]
'3'
What you're trying to do is use a string as an index, which is bound to
fail:
>>> y['2']
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: list indices must be integers
And the error message says it all: a list index must be an integer.
I guess you better do some reading up on Python syntax... Have you done the
tutorial?
--- Heiko.
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