You know, those things you can’t change once they’ve been created? Yeah, them. But why would anyone want to use these frozen objects instead of the more flexible mutable ones? Well, let me tell ya…
First off, lets define what we mean by “immutable sequence.”In Python, a sequence is any object that can be indexed and sliced (like strings, lists, and tuples). But unlike lists, which you can modify after creating them, immutable sequences cannot be changed. This means that once an immutable sequence has been created, its contents are set in stone or rather, frozen in memory.
So why would anyone want to use these “frozen objects” instead of the more flexible mutable ones? Well, for starters, they’re faster and consume less memory than their mutable counterparts. This is because immutable sequences don’t need to allocate new memory every time you modify them since they can’t be modified!
But thats not all. Immutable sequences are also thread-safe, meaning that multiple threads can access the same object without worrying about data corruption or race conditions. And since they can’t be changed, there’s no need to worry about synchronization issues which is a huge win for performance in multi-threaded environments.
Now lets take a closer look at some of Python’s immutable sequences: strings, tuples, and bytes.
Strings are probably the most familiar of these three. They consist of a sequence of characters (like “hello” or “Python is awesome!”). Strings can be indexed to access individual characters, sliced to extract subsequences, and concatenated with other strings using the + operator. But once a string has been created, its contents cannot be changed which means that you’ll need to create a new string if you want to modify it (either by appending or replacing).
Tuples are similar to lists in many ways, but they have one key difference: tuples are immutable. This means that once a tuple has been created, its contents cannot be changed which can be both good and bad depending on your needs. On the one hand, this makes tuples faster than lists (since there’s no need to allocate new memory every time you modify them). But on the other hand, it also means that if you want to add or remove items from a tuple, you’ll need to create a new tuple with those changes which can be less efficient.
Bytes are similar to tuples in many ways as well, but they have one key difference: bytes consist of 8-bit integers (like “b’\x01\x02′” or “b’hello world!’”). This makes them useful for working with binary data like images, videos, and other multimedia files. But since bytes are immutable as well, you’ll need to create a new byte object if you want to modify the contents of an existing one (either by appending or replacing).
They may not be as flexible as their mutable counterparts, but they offer some key advantages in terms of performance, thread-safety, and memory consumption. And who knows? Maybe one day we’ll all embrace the frozen object lifestyle!
Later !