python-if判断

# -*- coding:utf-8 -*-
# Author:DliYao
import getpass
'''
_username = "dengliyao"
_password = "dly"

username = input("username: ")
#password = getpass.getpass("password: ")
password = input("password: ")

if _username == username and _password == password:
   print("{name}...登陆成功".format(name=username))
else:
   print("用户名或密码错误")

'''


#用户输入一个年龄进行判断

age_of_oldboy = 20
guess_age = int(input("guess age: "))

if guess_age == age_of_oldboy:
   print("正确")
elif guess_age > age_of_oldboy:
   print("大了")
else:
   print("小于")