finding and replacing elements in a list

Question

I have to search through a list and replace all occurrences of one element with another. So far my attempts in code are getting me nowhere, what is the best way to do this?<

Answer 1

Find & replace just one item

your_list = [1,2,1]     # replace the first 1 with 11

loc = your_list.index(1)
your_list.remove(1)
your_list.insert(loc, 11)