Assigning multiple variables in one line

Question

I am trying to make the Fibonacci sequence I don\'t get why this:

def fibonacci(n):
    f1 = 0
    f2 = 1
    i = 1

    while i < n:
        print(f2)
               


        

Answer 1

In the first example, the value of f1 from the previous iteration is discarded before f2 is updated.

f1, f2 = f2, f1 + f2

can be seen as shorthand for

tmp = f1
f1 = f2
f2 = tmp + f2

if that helps it make more sense. The latter is what you'd have to do in many other languages to get the desired effect.