如何在python中打印字典鍵和值

Question

我必須制作一個程序，要求用戶為每個學生輸入學生姓名和成績。 並將它們作為 [keys] 和 [values] 放入字典中。 當用戶輸入“q”時，程序退出，然后打印學生和他們的成績，如下所示：

Student Grade
Student1 A
Student2 B
Student3 C

我的代碼如下所示：

student_grades = {}

while True:

    ## Get the Name [key in dictionary] of the student
    name = raw_input("Please give me the name of the student (press q to quit): \n")

    if name == 'q':
        print "Okay, printing grades! \n"
        for x in student_grades:
            print student_grades.keys() + student_grades.values()
        break

    # Chcek if name isn't valid
    elif name.isdigit():
        print "Sorry, {} isn't valid".format(name)
        name = raw_input("Please give me the name of the student (press q to quit): \n")

    ## Get the grade [value in dictionary] of the student
    grade = raw_input("Please give me their grade: (e.g 'A', 'B', 'C', 'D', 'F') \n")

    # Check if grade isn't valid
    if not grade in ['A', 'B', 'C', 'D', 'F']:
        print "Sorry, {} isn't valid".format(grade)
        grade = raw_input("Please give me their grade: (e.g 'A', 'B', 'C', 'D', 'F') \n")
        # Assign Name to Grade
        student_grades[name] = grade

當我輸入“q”時，程序應該打印學生姓名和成績的鍵和值，但它什么也不打印

Answer 1

您可以像這樣訪問字典的鍵和值：

for k, v in mydict.iteritems():
    print(k, v)

在 Python 3 中，這被更改/改進為：

for k, v in mydict.items():
    print(k, v)