The Python Apprentice

Exploring Built-in Collection types

We've already encountered some of the built-in collections

• str – the immutable string sequence of Unicode code points

• list – the mutable sequence of objects

• dict – the mutable dictionary mapping from immutable keys to mutable objects

We've only scratched the surface of how these collections work, so we'll explore their powers in greater depth in this chapter. We'll also introduce three new built-in collections types:

• tuple - the immutable sequence of objects

• range - for arithmetic progressions of integers

• set - a mutable collection of unique, immutable objects

We won't cover the bytes type any further here. We've already discussed its essential differences with str, and most of what we learn ...