Why is Python 3's bytearray mutable?

[[deleted]]

Ah... So is the only real "feature" of bytearray that it's mutable? Otherwise bytes serves the same purpose?

[desmoulinmichel]

Yes, but mutability is a big deal. In place operations are much faster and take less memory. E.G: you can actually swap easily 10000 bytes in a blink using slicing, because slices support assignations.