Find the index of the n'th item in a list

Question

I want to find the index of the n\'th occurrence of an item in a list. e.g.,

x=[False,True,True,False,True,False,True,False,False,False,True,False,True]
         


        

Answer 1

I think this should work.

def get_nth_occurrence_of_specific_term(my_list, term, n):
    assert type(n) is int and n > 0
    start = -1
    for i in range(n):
        if term not in my_list[start + 1:]:
            return -1
        start = my_list.index(term, start + 1)
    return start