names = ['关羽', '张飞', '赵云', '马超', '黄忠'] courses = ['语文', '数学', '英语']

录入五个学生三门课程的成绩

错误 - 参考http://pythontutor.com/visualize.html#mode=edit

scores = [[None] * len(courses)] * len(names)

scores = [[None] * len(courses) for _ in range(len(names))] for row, name in enumerate(names): for col, course in enumerate(courses): scores[row][col] = float(input(f'请输入{name}的{course}成绩: ')) print(scores)

修改正确内容： names = ['关羽', '张飞', '赵云', '马超', '黄忠'] courses = ['语文', '数学', '英语'] scores = [[None] * len(courses) for _ in range(len(names))] for row, name in enumerate(names): for col, course in enumerate(courses): scores[row][col] = float(input(f'请输入{name}的{course}成绩: ')) print(scores)