Python语言编写有趣练习题！

清疚 2021-12-05 02:49 290阅读 0赞

#### 1. 登录作业： ####

写一个登录程序，登录成功之后，提示XXX欢迎登录，登录失败3次后，提示账户锁定

username = "admin"
    passwd = "1234"
    count =0
    _username = str(input("请输入用户名："))
    while count < 3:
        _passwd = str(input("请输入密码："))
        if _username == username and _passwd == passwd :
            print(username,'欢迎登录')
            break
        else:
            if count < 2:
                print("输入错误，请检查后再一次输入")
            else:
                print("由于你输入的错误次数过多，登录已经被锁定")
        count += 1
        if count == 3:
            f =open("lock.txt","a",encoding="utf-8")
            f.write("\n")
            f.write(_username)

#### 2. 判断密码是否安全 ####

设计一个密码是否安全的检查函数。  
密码安全要求：  
1.要求密码为6到20位，  
2.密码只包含英文字母和数字

import re
    
    def check_code(code):
        while True:
            if len(code) < 6 or len(code) > 20:
                return '密码长度不足6-20位'
                break  # 不用break将是死循环
            else:
                for i in code:
                    s = ord(i) in range(97, 123) or ord(i) in range(65, 91) or ord(i) in range(48, 59)
                if not s:
                    return '密码只能包含英文字母和数字，不能填入其他字符'
                    break
                else:
                    return '密码安全'
    
    print(check_code('555555'))

#### 3. 有1、2、3、4个数字，能组成多少个互不相同且无重复数字的三位数？都是多少？ ####

分析：  
\- 可填在百位、十位、个位的数字都是1、2、3、4  
\- 组成所有的排列后再去掉不满足条件的排列

for i in range(1,5):
        for j in range(1,5):
            for k in range(1,5):
                if( i != k ) and (i != j) and (j != k):
                    print (i,j,k)

#### 4. 打印楼梯，同时在楼梯上方打印两个笑脸 ####

print("^_^",end='')
    for i in range(1,11):
        for j in range(1,i):
            print('===',end='\t')
        print()

延伸一下，很有趣！

import turtle
    
    # 画矩形立方体
    def draw_cube(i):
        turtle.begin_fill()
        turtle.color("black")
        turtle.goto(i, i * 3)
        turtle.goto(100 + i, i * 3)
        turtle.goto(100 + i, 20 + i * 3)
        turtle.goto(i, 20 + i * 3)
        turtle.goto(i, i * 3)
        turtle.end_fill()
        turtle.penup()
        turtle.goto(i, 20 + i * 3)
        turtle.pendown()
        turtle.goto(10 + i, 30 + i * 3)
        turtle.goto(110 + i, 30 + i * 3)
        turtle.goto(110 + i, 10 + i * 3)
        turtle.goto(100 + i, i * 3)
        turtle.penup()
        turtle.goto(100 + i, 20 + i * 3)
        turtle.pendown()
        turtle.goto(110 + i, 30 + i * 3)
    
    # 画笑脸
    def draw_smile_face(x, y):
        turtle.goto(x + 50, y)
        turtle.pensize(1.5)
        # 脸部
        turtle.circle(20)
        turtle.penup()
        # 眼睛
        turtle.goto(x + 40, y + 20)
        turtle.pendown()
        turtle.begin_fill()
        turtle.color("black")
        turtle.circle(3)
        turtle.end_fill()
        turtle.penup()
        turtle.goto(x + 60, y + 20)
        turtle.pendown()
        turtle.begin_fill()
        turtle.color("black")
        turtle.circle(3)
        turtle.end_fill()
        turtle.penup()
        # 嘴巴
        turtle.goto(x + 45, y + 10)
        turtle.pendown()
        turtle.right(90)
        turtle.pensize(2)
        turtle.circle(5, 180)
    
    def main():
        turtle.speed(2)
    
    for i in range(0, 100, 10):
        draw_cube(i)
    draw_smile_face(100, 300)
    turtle.hideturtle()
    time.sleep(3)
    
    main()

#### 5. 打印心形 ####

import time
    sentence = "Dear, I love you forever!"
    for char in sentence.split():
       allChar = []
       for y in range(12, -12, -1):
           lst = []
           lst_con = ''
           for x in range(-30, 30):
                formula = ((x*0.05)**2+(y*0.1)**2-1)**3-(x*0.05)**2*(y*0.1)**3
                if formula <= 0:
                    lst_con += char[(x) % len(char)]
                else:
                    lst_con += ' '
           lst.append(lst_con)
           allChar += lst
       print('\n'.join(allChar))
       time.sleep(1)

#### 6. 9\*9乘法表 ####

for i in range(1,10):
        for j in range(1,i+1):
            print(str(j) + str("*") + str(i)+"=" + str(i*j),end="\t")
        print()

转载于:https://www.cnblogs.com/wyunuo/p/11110823.html