Operating on Sequence Types

Operating on Sequence Types

We can iterate over the items in a sequence s in a variety of useful ways: 

Table : Various ways to iterate over sequences

Python Expression	Comment
for item in s	iterate over the items of s
for item in sorted(s)	iterate over the items of s in order
for item in set(s)	iterate over unique elements of s
for item in reversed(s)	iterate over elements of s in reverse
for item in set(s).difference(t)	iterate over elements of s not in t
for item in random.shuffle(s)	iterate over elements of s in random order