[Tutor] Fibonacci Series

[Dominik George]

Hi,

>     a, b = b, a +b

> a = b = 1
> b = a + b = 1 + 1 = 2

Your issue is that you interpret the assignment wrong. You seem to think
that it assigns b to a and THEN a+b to b, which is not the case. The
right side of the assignment creates a tuple, and the left side unpacks
it. It is the same as:

t = (b, a+b)
a = t[0]
b = t[1]

You see that a has not been assigned yet when the second part is calculated.

Cheers,
Nik

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<mirabilos> Aaah, it vibrates! Wherefore art thou, demonic device??

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