how to add the numbers of a list

[Yoriz]

def calc_cumulative_attendance(attendance):
    cumulative_attendance = [attendance[0]]

    for item in attendance[1:]:
        cumulative_attendance.append(item + cumulative_attendance[-1])
    
    return cumulative_attendance
    
print(calc_cumulative_attendance([1, 1, 1, 1]))
print(calc_cumulative_attendance([0, 1, 0, 1]))

Output:
[1, 2, 3, 4]
[0, 1, 1, 2]