Python offers immutable data structures in addition to the mutable ones. Tuples are immutable, we've had namedtuple for a while, and now it's possible to write

Python offers immutable data structures in addition to the mutable ones. Tuples are immutable, we've had namedtuple for a while, and now it's possible to write immutable data classes as well. As time goes by, I find myself using less and less mutability in Python. At this point I default to immutable structures, and I bring in mutable ones only if I need them for performance or there's no reasonable immutable alternative.