python基本语法运用（2）

「爱情、让人受尽委屈。」 2022-06-09 09:06 258阅读 0赞

**让密码加密**

imprt getpass
    password=getpass.getpass("password:")

*但是这种方式在pycharm中不好使，在命令行中可以*  
**验证，用户名和密码**

![这里写图片描述][SouthEast]

*  python中是强制缩进，节省代码，结构清晰
 *  上级，不用缩进，和他有关系的下级要缩进。就像上面的if和他的下一句，else和他的下一句  
    \-`IndentationError`就是缩进错误  
    **elif**  
    *记住，python中没有else if 而是 elif*  
    *这是一个猜数游戏*

Liu_Yang=88
    guess_age=int(input("guess age:"))
    if guess_age==Liu_Yang:
        print("yes,you got it")
    elif guess_age>Liu_Yang:
        print("think small")
    else:
        print("think big")

*改进 上面的游戏，让猜对或者超过3次就退出*

Liu_Yang=88
    count =0
    while True:
        if count==3:
            break
        guess_age=int(input("guess age:"))
        if guess_age==Liu_Yang:
            print("yes,you got it")
            break
        elif guess_age>Liu_Yang:
            print("think small")
        else:
            print("think big")
            count+=1

*进一步优化代码*

*进一步 让代码人性化一点*

Liu_Yang=88
    count =0
    while count<3:
        guess_age=int(input("guess age:"))
        if guess_age==Liu_Yang:
            print("yes,you got it")
            break
        elif guess_age>Liu_Yang:
            print("think small")
        else:
            print("think big")
            count+=1
    else:
        print("you have tried too many times ...fuck off")

*对for的运用*

Liu_Yang=88
    
    for i  in range(3):
        guess_age=int(input("guess age:"))
        if guess_age==Liu_Yang:
            print("yes,you got it")
            break
        elif guess_age>Liu_Yang:
            print("think small")
        else:
            print("think big")
    else:
        print("you have tried too many times ...fuck off")

*  我们 跳过一个 打印一个，

for i in range(0,10,2):
        print("loop" ,i)

*  输出结果：  
    ![这里写图片描述][SouthEast 1]
 *  这里若写`for i in range(0,10,3):`就是隔两个 跳一个 。它的意思是步长
 *  实现询问对方是否继续，在进行下一步 ：

Liu_Yang=88
    count =0
    while count<3:
        guess_age=int(input("guess age:"))
        if guess_age==Liu_Yang:
            print("yes,you got it")
            break
        elif guess_age>Liu_Yang:
            print("think small")
        else:
            print("think big")
            count+=1
            if count==3:
                countine_confirm=input("do you want to keep?")
                if countine_confirm !='n':
                    count =0

[SouthEast]: /images/20220609/c0a415e2f6e84942918811a8334c52b5.png
[SouthEast 1]: /images/20220609/37640c39c1f5473ebbaefde8bfc469e2.png