Assigns values Python

Question

I know this is simple! but can someone explain this for me
why assigning a to b after this

a = [2,4,6,8]
b = a
b[0]=7
a[3]=9
b.append(5)
print(a)
print(b)

both a & b have same values ???

Answer 1

Yes, the have the same values.
Because when you write "b=a" you actually pointed b to the same place in memory as a and that is mean that every change you will do in a will have effect on b, and every change you will change in b will have effect on a.

Answer 2

a&b are variables that are pointers to the same object.

If you let b=list(a), they would point to different objects with the same value instead.

Then Mahdi Moradi, the outputs will be different.

Answer 3

KfirWe look at my solution and it is actually easier that way :)

Answer 4

Mahdi Moradi

a=[2,4,6,8]
b=[]
for i in a:
b.append(i)
a[0]=3
b[3]=5
b.append(10)
print(a)
print(b)

Now the a and b don't point to the same place in memory and the output will be diffrent.

Answer 5

Prometheus 🇸🇬
Ohh you right, b=list(a) more easier and effective😁

Answer 6

KfirWe
what to do to stop that? and have different values at the end?