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

This can be easily done by using enumerate function

code-

lst=[1,2,3,4,1,6,7,9,10,1,2]
for index,item in enumerate(lst):
    if item==1:
        lst[index]=10 #Replaces the item '1' in list with '10'

print(lst)