why is the answer false false ?

Question

a = [1,[2,3]] b= [1,2,3] c=a[:] d = b[:] print(c is a , d is b )

Answer 1

[:] makes a copy of a list.

The new list will be equal - like a twin. But it's not the original same list. Therefore 'is' gives False.

If you write c==a, you get True.

For more details, read this:

https://code.sololearn.com/c89ejW97QsTN/?ref=app

Answer 2

https://code.sololearn.com/cUVsE6fxgkG4/?ref=app

Answer 3

Slick, the fun begins when you add this line to your code:

print(a[1] is b[1])

Answer 4

HonFu i wonder why that is, they also have the same id! The madness

Answer 5

Slick, you will find the reason in my tutorial. 😉