python基础02

 1.分苹果

m =7
m_new = 1
while m != 1: 
    print(m_new,m)
    m_new *= m
    m -= 1
2.验证码

#随机产生基于范围内的随机数字
#import random
#yzm = random.randrange(1000,9999)
#print(yzm)
import random
for i in range(3):
    yanzhengma = random.randrange(1000,9999)
    print('验证码为： %d' % yanzhengma)
    input_ = int(input('输入你的验证码：'))
    if input_ == yanzhengma:
        print('ok')
        break
    else:
        print('验证码错误请重新输入')
3.混合密码

import numpy as np
a = ['A','B','1','2']
np.random.randint(a)
print(a)
4.循环

import time
i = 1
while i !=0:
    time.sleep(1)
    print(i)
    i -= 0.1
 5. 银行卡密码

import random
yzm = random.randrange(1000,9999)
print('验证码为： %d' % yzm)
input_ =int(input('输入验证码：'))
while input_ = yzm:
    print('ok')
    break
6.密码输入三次错误锁死

password = int('123456')
passw = int(input('输入你的密码：'))
for i in range(2):
    
    if passw == password:
        print('ok')
        break
    else:
        print('密码错误请重新输入')
        passw = int(input('输入你的密码：'))
else:
    print('账号锁定请移步柜台')
7.计算器

n1,n2 = map(float,input('num1,num2 ').split(','))
choose_method = input('Choose Method:[+,-,*,/]')
if choose_method in '+-*/':
    if choose_method =='+':
        print('%.2f +%.2f = %.2f' % (n1,n2,n1+n2))
    elif choose_method =='-':
        print('%.2f - %.2f = %.2f' % (n1,n2,n1-n2))
    elif choose_method =='*':
        print('%.2f * %.2f = %.2f' % (n1,n2,n1*n2))
    else :
        print('%.2f / %.2f = %.2f' % (n1,n2,n1/n2)) 
    pass
else:
    raise KeyError('only choose [+,-,*,/]')
8.方程组