Python 练习小代码

猜年龄（code）age = 30

flag = True

while flag == True:
    guess =int(input('your guess age:'))
    if guess == age:
        print('you right!')
        flag = False
    else:
        print('your is error!')
        if guess < age:
            print('maybe is small!')
        elif guess > age:
            print('maybe is big!')

求最大值和最小值（支持用户输入数字）

def num_list():   #将输入的数字，存入一个列表
    num_list_a = []
    flag = True
    while flag == True:

        your_choice = input('exit:')
        if your_choice == 'yes':
            flag = False
        else:
            num = int(input('>>:'))
            num_list_a.append(num)
    return num_list_a
def max_min_num(a):   #求出最大值和最小值
    max = 0
    min = a[0]
    for i in a:
        if i < min:
            min = i
        if i > max:
            max = i
    print('the max number :',max)
    print('the min number :',min)
    return
max_min_num(num_list())

打印出一个九九乘法表：

for i in range(1,10):
    for j in range(1,i+1):     # 对于九九乘法表要注意他的每行，是第一个数在递增
        print('%d * %d = %d' % (j, i, i*j), end='    ')     # end的方法是将在本次循环中的输出的所有内容在一行输出
    print()   # 相当于一个换行符的作用

求最大公约数的个数

a = int(input('a = '))
b = int(input('b = '))

def times(x,y):  
    timess = 0  
    if x > y:  
        max = x+1
    else:
        max = y+1
    for i in range(1,max):
        if x % i == 0 and y % i == 0:
            timess += 1
    return timess
print(times(a,b))


一个购物车程序：

这是一个简单的购物程序

实现的功能有：

1.自定义商品在shopping_list 中
2.可以实时退出
3.可以输入你有多少钱
4.有是否确认支付的片段
5.可以循环购买


shopping_list = {'apple':10,
                 'banana':20,
                 'book':50}

def show_shopping():   #  shopping show
    n = 0
    print('----------------shopping store----------------\n'
          'welcome shopping store!!!!\n'
          'this is my store all shopping!\n'
          '----------------------------------------------')
    for shopping in shopping_list:

        print('%d  --->  %s,%d' % (n,shopping,shopping_list[shopping]))
        n+=1
# show_shopping()   the test
# your_all_money -= shopping_list[your_choice]
# print('you have %d yuan now, and you purchase one %d' % (your_all_money,your_choice))


# 需要再次购买
def buy_again():
    global flag
    buy_again = input('you want to buy again:')
    if buy_again == 'yes':
        show_shopping()
        main()
    else:
        print('wlcome again!')
        flag = False
    return flag
# 主函数
def main():
    # 调用全局变量
    global your_all_money
    global flag
    while flag == True:
        exit = input('exit now:')
        if exit == 'yes':
            print('welcome again')
            flag = False
        else:
            show_shopping()   # show
            your_choice= input('please enter you want to buy commodity:')
            if your_choice in shopping_list:
                print('you need pay %d yuan !!' % shopping_list[your_choice])
                pay_choice = input('make sure to pay:')
                if pay_choice == 'yes':
                    your_all_money -= shopping_list[your_choice]
                    print('you have %d yuan now, and you purchase one %s' % (your_all_money,your_choice))

                    flag = buy_again()

                else:

                    flag = buy_again()
            else:
                print('please enter again!')
                main()
flag = True    # 控制直接退出程序
your_all_money = int(input('your all money:'))
main()

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