Dave Angel <d...@davea.name> wrote:
> Would you like to define "exists" ? A list is not sparse, so all items
> exist if their subscript is less than the length of the list. So all
> you need to do is compare 2 to len(fld).
>
Yes, a I said a simple len(fld) will tell me if fld[2] 'exists' but it
gets messy if I have to do it in the middle of the print sequence.
> But perhaps there's another approach. Just what DO you want to print if
> fld(1) exists, but fld(2) does not? Do you still want to print out day,
> fld(1), and balance? Or do you want to skip balance as well?
>
Here's a sample of the file whose lines are being split() :-
01 JB 0.00 Start of 2012, Initial balance
02 BB 0.00
13 ZB 0.00
I want to print out everything, it's just that in some cases there's
no descriptive text (the bit that ends up in fld[2]).
> if you literally want nothing printed for list elements beyond the end,
> then I'd add some extra empty-strings to the end of the list.
>
> fld.extend("" * 5)
>
> Now, subscripts 0 through 4 inclusive will work, as specified.
>
That's probably the simplest approach, thank you.
--
Chris Green
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