Explanation for below code?

Question

arr=[(5,8,0),(2,4)]
sum=[]
for x, *y in arr:
sum += y
print(sum)

Answer 1

for x, *y in arr:
print(x, y)

Output:
5 [8, 0]
2 [4]

Variable "y" takes all the left-over values from each tuple in "arr".

Take a look at the second slide of this lesson to get a better understanding.
https://www.sololearn.com/learn/JUMP_LINK__&&__Python__&&__JUMP_LINK/2485/