Def val_lst?

Question

What is the output of this code?
def val_lst():
return [x + y for x in 'spam' for y in 'SPAM']
print(len(val_lst()))
Output: 16

spam + SPAM is 8? Where does it say to multiply?

Thanks for any help.

Answer 1

Here one cycle of 4 characters is nested in another cycle of 4 characters: "4+4+4+4".
val_lst()=[
sS, sP, sA, sM,
pS, pP, pA, pM,
aS, aP, aA, aM,
mS, mP, mA, mM]

Answer 2

I see. Thanks Vas:).