我的代码中有什么错误，它没有按预期工作

Question

所以我的代码运行并且没有任何错误，只是因为它没有做我编码的事情，它没有要求＆＃34;选项＆＃34;变量并跳过for循环和＆＃34; num_of_details＆＃34;变量，有人可以解释什么是错的吗？

def menu():
option = input("1 = Enter and store student details")    
if option == 1:
    num_of_details = int("How many student detail's do you wnat to add?")
    database = open("database.txt","r+")
    for i in range(num_of_details):
        student_details()
        database.write([surname,forename,date_of_birth,home_address,home_phone_number,gender,unique_ID_number,school_email])      
menu()