使用python实现当猜数字，当数字大了，提示数字大，数字小了提示数字小，如果3次猜错，询问是否继续猜

使用while循环来实现代码如下

num=56
count=0
while count<=2:
    guess=input('enter your guessing number:')
    if guess.isdigit():
        guess=int(guess)
        if guess==num:
            print('congratulations!')
            break
        elif guess>=num:
            print('think smaller!')
        else:
            print('think bigger!')
    else:
        print('error!')
    count+=1
    if count==3:
        answer=input('would your like to try again?(Y/N)')
        if answer=='Y':
            count=0
        else:
            break