python - Immutable vs Mutable types - Stack Overflow
Nov 9, 2011 · 2. List of mutable vs immutable objects in Python. Here's a list of the most common mutable and immutable objects in Python. This list can be obtained by 1) painstakingly searching Python's official "Built-in Types" reference page for the words "mutable" and "immutable", or by 2) asking GitHub Copilot (or BingAI or ChatGPT) for it. I did both.
Why are integers immutable in Python? - Stack Overflow
May 31, 2016 · Classes should be immutable unless there's a very good reason to make them mutable....If a class cannot be made immutable, limit its mutability as much as possible; 4- Ease to use. Is easier to read, easier to maintain and less likely to fail in odd and unpredictable ways.
immutability - Check for mutability in Python? - Stack Overflow
Dec 8, 2010 · A type is mutable if it is not immutable. A type is immutable if it is a built-in immutable type: str, int, long, bool, float, tuple, and probably a couple others I'm forgetting. User-defined types are always mutable. An object is mutable if it is not immutable. An object is immutable if it consists, recursively, of only immutable-typed sub ...
oop - Mutable vs immutable objects - Stack Overflow
Oct 18, 2008 · Immutable means can't be changed, and mutable means you can change. Objects are different than primitives in Java. Primitives are built in types (boolean, int, etc) and objects (classes) are user created types. Primitives and objects can be mutable or immutable when defined as member variables within the implementation of a class.
How to make an immutable object in Python? - Stack Overflow
@hlin117: Every parameter is passed as a reference to an object in Python, regardless of whether it is mutable or immutable. For immutable objects, it would be particularly pointless to make a copy – since you can't change the object anyway, you may just as well pass a reference to the original object. –
The immutable object in python - Stack Overflow
Apr 14, 2012 · When assigning or passing a variable to a function, Python never creates a copy, it always passes/assigns the very same object you already have. Now, when you try to modify an immutable object, what happens? As already said, the object is immutable, so what happens instead is the following: Python creates a modified copy. As for your example:
how to make a variable immutable in python - Stack Overflow
Sep 30, 2012 · In Python, when you say x = [], a new list object is created and x is made to "point" to that list. Now any change you make to x is affecting this object. Suppose you say y = x , you will get another reference to the same object.
What is the theory behind mutable and immutable types?
Jul 2, 2011 · In Python everything just works the way I expect, and I quickly realized that the mutable/immutable distinction plays an important part in that. There are still a few wrinkles, of course (mutable function argument defaults being a notable example) but overall, I feel that the mutable/immutable distinction greatly clarifies the question of what ...
python - are user defined classes mutable - Stack Overflow
Aug 22, 2012 · User classes are considered mutable. Python doesn't have (absolutely) private attributes, so you can always change a class by reaching into the internals. For using your class as a key in a dict or storing them in a set, you can define a .__hash__() method and a .__eq__() method, making a promise that your class is immutable. You generally ...
python - Why can tuples contain mutable items? - Stack Overflow
Mar 18, 2012 · One reason is that there is no general way in Python to convert a mutable type into an immutable one (see the rejected PEP 351, and the linked discussion for why it was rejected). Thus, it would be impossible to put various types of objects in tuples if it had this restriction, including just about any user-created non-hashable object.