6. Looping backward

The key here is to avoid the awkward -1 values and nested functions (look at how many parenthesis pairs are involved). Use reverse to make your code more elegant.

6.1. Don’t do this

names = ['john', 'jane', 'jeremy', 'janice', 'joyce', 'jonathan']

for i in range(len(names) - 1, -1, -1):
    print(names[i])

6.2. Do this

names = ['john', 'jane', 'jeremy', 'janice', 'joyce', 'jonathan']

for name in reversed(names):
    print(name)