Python multivariable assignment

Question

>>> a = 5
>>> b = 3
>>> c = 7
>>> a, b, c = 3, a, b
>>> b
5

I am playing around with variable assignments and noticed that when I do multivariable assignments, b is assigned the value of a although I have just assigned a new value of 3 to a. Can someone explain this to me?

Answer 1

You're first packing the three values into a tuple and then unpack that tuple into a, b, and c, respectively, so at the moment that b gets assigned its new value, the value of a does not matter anymore.