find all index positions

[vbgunz]

I forgot to explain my reason for over shadowing the 'string' built-in
within my iterator. To me, it doesn't matter because the string
identifier is temporary within the function and dies when the function
dies. Also, I personally don't use the string function and prefer
''.join('hi'), etc. Also, at least for me just starting out in Python,
I find 'string' to be as readable as possible :)

what do you think about that?