我不能让数据保留在字典中，它会不断更新

Question

我给自己买了一本 python 书。目前，在书中，我正在学习字典。这本书给了我一个关于字典的练习。就是这个问题。

"创建一个程序，将学生的姓名与他的 class 成绩配对。用户应该能够根据需要输入尽可能多的学生，然后打印出所有学生的姓名和成绩。输出应该看起来像这样：

Please give me the name of the student (q to quit): [input]

Please give me their grade: [input]

[And so on...]

Please give me the name of the student (q to quit): [input]: q

Okay, printing grades!

Student Grade

Student1 A

Student2 B

[And so on...] "

def student():
    studentmarks = {}
    while True:
        name = raw_input("Please give me the name of the student ('q' to quit):")
        if name == "q":
            break
        elif name.isalpha() == True:
            grade = raw_input("Please give me their grade ('q' to quit):")
            if grade == "q":
                break
            elif grade.isalpha() == True:
                print "Grade is a number! Please try again"
                continue
            elif grade.isdigit() == True:
                studentmarks = {name: grade}
            else:
                print "Error, please try again"
                continue
        else:
            print "Please try again. {} is not the right input".format(name)
            continue
        print studentmarks
        continue
student()

我稍微修改了代码以测试字典。我也用 python 2

Answer 1

你只犯了一个错误是当你将数据附加到字典时：

studentmarks = {name: grade}

应该是这样的:

studentmarks[name] = grade

Answer 2

每次到达此行时，您都在覆盖字典：

studentmarks = {name: grade}

应该是这样的：

studentmarks[name] = grade

我不能让数据保留在字典中，它会不断更新

I can't let the data to remain in the dictionary, it keeps updating instead

python

dictionary

python-2.7