how to find the last index in a list code example

Example 1: python last element in list

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

Example 2: python last index of item in list

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