Question

我正在尝试删除列表中的项目。学生= [[＆＃39; Bob＆＃39;，＆＃39; 95＆＃39;]，[＆＃39; Gretchen＆＃39;，＆＃39; 90＆＃39;]

我的代码如下：

 elif menu == 3:
        # Remove students
        student_removal = input("Please enter the name of the student you would like to remove")
        for s in student:
            if isinstance(student, type(list)):
                student.remove(student_removal)
        if student != student_removal:
            print("The student name you have entered is not in the grade book. Please choose a different option")

而不是从列表中删除项目，它只是给我打印声明。我做错了什么？

Answer 1

你可能会犯这个错误。如果你要存储键值对，我建议使用字典。您首先要定义这样的字典：

return float(total) / float(ratings);

现在，删除变得简单了：

student = { 'Bob' : '95', 'Gretchen' : '90' }

字典的优点是可以持续访问键值。

Answer 2

试试这个

student_removal = input("Please enter the name of the student you would like to remove")
if student_removal in student:
    student.remove(student_removal)
    print("Student removed from list")
else:
    print("The student name you have entered is not in the grade b")

在嵌套列表中访问要删除的项目？

2 个答案: