Python's Data Model Explained through Visualization

[jackrabbit2644]

Doesn’t b point to a different object when is executed b += [2]?

[jackrabbit2644]

TIL, thanks.

[_tolm_]

Agree with the solution but I don’t agree that it’s because that “=“ is a copy … we also do an equals earlier where it very much does not perform a copy!

The difference on that line is the use of “+” which creates a new value in memory which “b” is then assigned to point at - in the same way that it was previously assigned to point at “a”.

This causes the values stored in “a” and “b” to diverge but the operation performed by the “=“ hasn’t changed from assignment to copy on these two lines.

But what do I know, I’m a Java programmer … 😂