python 随机产生一个整数 并猜测该数字小游戏

#form模块名 import 方法名
#randint(a,b) :产生(a,b)范围内随机整数
from random import randint
num = randint(1,100)
print ('Guess what I think?')
answer = 1
while num!=answer:
    answer = int(input())
    if answernum:
     print ('too big!')
    if answer==num:
     print ('BINGO!')