Mutable and Unmutable

Question

can someone please explain mutable and unmutable idea and conception to me? thank you.

bad_dict = {
[1, 2, 3]: "one two three",
}

Answer 1

a mutable object can be changed after it is created, and an immutable object can’t. Immutable objects doesn’t allow modification after creation.
**Checking immutability**
>>> a=5
>>> b=a
>>> id(a)==id(b)
True
>>> a=a+1
>>> print(a,b)
6 5
>>>
id(a)==id(b)
False

**Check mutability**
>>> a=[1,2]
>>> b=a
>>> id(a)==id(b)
True
>>> a[0]=3
>>> print(a,b)
[3, 2] [3, 2]
>>> id(a)==id(b)
True

Answer 2

Thank you Jay.

Answer 3

thank you all for helping me to understand. thanks a lot.

Answer 4

so mutable means that I can arrange them in any order. and immutable means that I must state the variable first then it's contents?