用if语句嵌套以[93,85,94,99]的输出列表作为输入，输出分级后的列表

代码如下：

scores = [93, 85, 94, 99]
graded_scores = []

for score in scores:
    if score >= 90:
        graded_scores.append('A')
    elif score >= 80:
        graded_scores.append('B')
    elif score >= 70:
        graded_scores.append('C')
    elif score >= 60:
        graded_scores.append('D')
    else:
        graded_scores.append('F')

print(graded_scores)

输出结果为:

['A', 'B', 'A', 'A']