定义函数 输入姓名、性别、年龄、学历

def func( name,age ,edu, gender = "男"):
    with open("student_msg", mode="a", encoding="utf-8") as f:
        f.write(name + "_" + gender  + "_" + age + "_" + edu + "\n" )
while 1:
    choice = input("如需退出请输入Q\q：")
    if choice != "Q" and choice != "q":
        name = input("请输入姓名：")
        gender = input("请输入性别：")
        age = input("请输入年龄：")
        edu = input("请输入学历：")
        if gender == "":
            func(name,age,edu)
        else:
            func(name,age,edu,gender)
    else:
        break