请问python里try 加while(1)是啥作用呀

try:
    while 1:
        n = int(input())
        flag = int(input())
        name_grade = []
        for i in range(n):
            temp = input()
            temp = temp.split()
            name_grade.append(temp)
        result = sorted(name_grade, key =lambda x: int(x[1]), reverse = 1-flag)
        for i in result:
            print(i[0], i[1])
except:
    pas***r />