find sublist inside list

[John O'Hagan]

On Mon, 4 May 2009, Matthias Gallé wrote:
> Hi.
>
> My problem is to replace all occurrences of a sublist with a new element.
>
> Example:
> Given ['a','c','a','c','c','g','a','c'] I want to replace all
> occurrences of ['a','c'] by 6 (result [6,6,'c','g',6]).
>

li=['a', 'c', 'a', 'c', 'c', 'g', 'a', 'c'] 
for i  in range(len(li)):
    if li[i:i + 2] == ['a', 'c']:
        li[i:i + 2] = ['6']

HTH,

John