python列表中if语句的用途

scores = [100, 98, 59, 60, 78, 99, 57, 63]

flag = 0

for score in scores:

    if score <= 60:

        flag += 1

print('共有 ' + str(flag) + ' 门课程不及格。')

scores = []

flag = 0

if scores:

    for score in scores:

        if score <= 60:

            flag += 1

    print('共有 ' + str(flag) + ' 门课程不及格。')

else:

    print('暂时没有成绩公布')