Talk video

Python is mutable to the core. Internals of objects and data structures are not only introspectable at runtime but also mostly modifiable. This is very useful and a big reason why Python is the language of our choice.

However, proper immutable collections do provide significant unique advantages, too. Python provides a few of those: strings, bytes, tuples, and frozensets. With the immutables package you can also use an efficient Map implementation.

In this talk we'll go through a whirlwind tour of those advantages and how knowing about them can change how you design your software.