here what happens guys, what is the mean f assert

Question

Assert sum_list([1,2,3])==6

Answer 1

1+2+3=6

do the sum of numbers

Answer 2

It basically means "Make sure that the sum of these numbers is 6. If not, stop the program here.". It's a way to prevent crashes after this line. Instead of crashing, the program will stop at the assert.