I apologise since this question has been asked before, but I did not really understand the answer and the comments, but I do not have enough reputation to comment on those threads...
Changing variable order in Python comma-separated multiple assignment [duplicate]
Essentially I do not understand what order python does variable assignment when you assign multiple of them in the same line.
For example:
a, b,= [2,3,4,5], [1]
a[1:], a, b = b, a[1:], a
print("a = ", a)
print("b = ", b)
returns
a = [3, 4, 5]
b = [2, 1]
From what I understand, python evaluates the RHS of the assignment statement first, so it evaluates
b, a[1:], a to be 1, [3,4,5], [2,3,4,5].
But this doesn't make sense because b = [2,1].
Furthermore, if I were to instead do a, b, a[1:] = a[1:], a, b, it will instead return
a = [3, 1]
b = [2, 3, 4, 5]
So it seems the order does matter, and it seems to go from left to right.
However if I were to do b, a[1:], a = a, b, a[1:], it returns
a = [3, 4, 5]
b = [2, 1]
Why does it not evaluate b = a first which should return [2,3,4,5]?
Would really appreciate if anyone could explain this to me...
