我在哪里可以在此代码中实现while循环？

Question

我对编码很新，所以这个问题可能非常愚蠢和明显，但我应该在哪里放置我的循环，以便每次我在字典中添加新密钥时StuL都不会重置，因为每次我都有试图输入循环用户添加的密钥保持重置

import time
StuL = {"1317281" : "Name : Reese John ID :1317281 DoB : 12/11/95 Address 
: 57 Fake Road Phone Number : 02087475632 Gender : Male Tutor Group : 10K  
Email : JohnReese@HighSchool.com"} 
UserName = input ("Enter Username: ")
PassWord = input ("Enter Password: ")
if UserName == "MrLeeman" and PassWord == "hunter2":
    time.sleep(1)
    print ("Login successful")
    time.sleep(1)
    ch=(input("Enter your choice\n1:View student details\n2:Add 
    Students\n3:Exit"))
    if ch == "1":
        time.sleep(1)
        inp = input("Enter student's ID number")
        if inp in StuL:
            time.sleep(1)
            print(StuL[inp])
    elif ch == "2":
        time.sleep(1)
        edit=input("Enter the ID for the student you wish to add")
        inf=input("Enter the information for the student in the following 
        order\nName,ID,DoB,Address,Phone number,Gender,Tutor 
        Group,Email")
        StuL[edit] = inf
    elif ch == "3":
        break


   else:
        print("Invalid option")
else:
        print ("Password did not match")