is there a reverse index?

[Skaperen]

i need the index of the first occurrence of in s (at or after index i) just like s.index(x,i) but in reverse. that is, equivalent to testing slices of s[i:i+len(x)] for a decrementing value of i. anyone know of such a method or function? this is for a str type though a general solution for any sequence type would be great.