python last index of item in list

1# To get the last element in a list you use -1 as position
2bikes = ['trek', 'redline', 'giant']
3bikes[-1]
4# Output:
5# 'giant'

1your_list = ["apple", "orange", "grapes"]
2last_value = your_list[-1]

1def list_rindex(li, x):
2    for i in reversed(range(len(li))):
3        if li[i] == x:
4            return i
5    raise ValueError("{} is not in list".format(x))