Question

我有这个程序计算模块，根据价格计算每个项目的总分和总数：

#calculate
def calculate1():
    a4canon = (int(input('A4 paper (canon):')))*8.9
    a4rainbow = (int(input('A4 paper (rainbow):')))*7.5
    lruler = (int(input('Long ruler:')))*0.85
    sruler = (int(input('Short ruler:')))*0.55
    blue = (int(input('Blue pen:')))*0.65
    red = (int(input('Red pen:')))*0.65
    black = (int(input('Black pen:')))*0.65
    pencil = (int(input('2B Pencil:')))*2.4

    total = a4canon + a4rainbow + lruler + sruler + blue + red + black + pencil

    a = str(a4canon)
    b = str(a4rainbow)
    c = str(lruler)
    d = str(sruler)
    e = str(blue)
    f = str(red)
    g = str(black)
    h = str(pencil)

    i = str(total)

    return [('A4 paper(canon):',a),('A4 paper(rainbow):',b),('Long Ruler:',c),
            ('Short Ruler:',d),('Blue Pen:',e),('Red Pen',f),('Black Pen:',g),
            ('2B Pencil:',h),('Total:',i)]

和显示模块：提示输出客户名称并继续将购买记录到文本文件中：

#display
import calculate
def display1(x):
    file = open('sample.txt','w')
    file.write(input('Customer name:'))
    lst = []
    lst = x
    for i in lst :
        file.write('\n'.join(list(i)))
    print('Your order is recorded. Thank you and please come again.')

和文件模块：

#file
import display
def file1(x):
    while True:
        user = input('Do you want to keep a record (y/n):')
        if (user == 'y') or (user == 'Y'):
            display.display1(x)
            break

        elif (user == 'n') or (user == 'N'):
            print('Thank You. Please come again')
            break

        else:
            print('Wrong input. Please try again.')

和主模块：协调和管理所有模块以执行任务：

import menu
import calculate
import file
import display

menu.menu1()
value = calculate.calculate1()
file.file1(value)

似乎文件中的数据没有按顺序保存：

bob8.9
A4 paper(canon):7.5
A4 paper(rainbow):Long Ruler:
0.85Short Ruler:
0.55Blue Pen:
0.65Red Pen
0.65Black Pen:
0.652B Pencil:
2.4Total:
22.149999999999995

我应该怎样做才能使它保存的数据如下：

customer Name:bob
A4 paper(canon):1 ~ 8.9
A4 paper(rainbow):1 ~ 7.5
Long Ruler:1 ~ 0.85
Short Ruler:1 ~ 0.55
Blue Pen:1 ~ 0.65
Red Pen:1 ~ 0.65
Black Pen:1 ~ 0.65
2B Pencil:1 ~ 2.4
Total:22.149999999999995

Answer 1

1）我认为没有任何理由导入菜单我没有看到它做任何事情。

2）我认为你不需要在main.py

中导入显示

尝试更改

file.write('\n'.join(list(i)))

到

file.write('\n{} {}'.format(i[0], i[1]))

这是我的输出

汤姆
     A4纸（佳能）：8.9
     A4纸（彩虹）：7.5

长尺：0.85

短标尺：0.55

蓝笔：0.65

红笔0.65

黑色笔：0.65

2B铅笔：2.4

总计：22.149999999999995

Answer 2

排序问题是由file.write(input('Customer name:'))在最后缺少\n引起的。需要file.write(input('Customer name:')+'\n')。

然而，仅凭这一点不能为您提供所需的输出，因为从calculate1()返回的列表并不包含数量和产品价格。虽然可以通过将一堆东西硬编码到其中来解决这个问题，但我认为对于更多的东西来说会更好......数据驱动＆＃34;这将简化代码并使其更容易修改。

虽然我添加了一个名为PRICE_LIST的新（有序）字典，其中包含产品名称和价格。其余代码使用它来尽可能多地控制它所执行的处理。

这就是我的意思（注意：所有代码都已放入单个文件中以简化更改）：

from collections import OrderedDict

PRICE_LIST = OrderedDict((
    ('A4 paper(canon)', 8.9),
    ('A4 paper(rainbow)', 7.5),
    ('Long Ruler', 0.85),
    ('Short Ruler', 0.55),
    ('Blue Pen', 0.65),
    ('Red Pen', 0.65),
    ('Black Pen', 0.65),
    ('2B Pencil', 2.4),
))

def calculate1():
    print('Enter the desired quanities of each item.')
    cart = {product: int(input(product+'?: ')) for product in PRICE_LIST}
    total = sum(cart[product] * PRICE_LIST[product] for product in cart)
    return [(product, cart[product], PRICE_LIST[product])
                for product in PRICE_LIST] + [('total', 1, total)]

def display1(lst):
    file = open('sample.txt', 'w')
    cust = input('Customer name: ')
    file.write(cust+'\n')
    for product, quanity, price in lst:
        file.write('{}: {} ~ {}\n'.format(product, quanity, price))
    print('Your order is recorded. Thank you and please come again.')

def file1(x):
    while True:
        user = input('Do you want to keep a record (y/n)?: ')
        if (user == 'y') or (user == 'Y'):
            display1(x)
            break
        elif (user == 'n') or (user == 'N'):
            print('Thank You. Please come again')
            break
        else:
            print('Wrong input. Please try again.')

value = calculate1()
file1(value)
print('done')

示例运行：

Enter the desired quanities of each item.
A4 paper(canon)?: 1
A4 paper(rainbow)?: 1
Long Ruler?: 1
Short Ruler?: 1
Blue Pen?: 1
Red Pen?: 1
Black Pen?: 1
2B Pencil?: 1
Do you want to keep a record (y/n)?: y
Customer name: Bob
Your order is recorded. Thank you and please come again.
done

之后sample.txt文件的内容：

Bob
A4 paper(canon): 1 ~ 8.9
A4 paper(rainbow): 1 ~ 7.5
Long Ruler: 1 ~ 0.85
Short Ruler: 1 ~ 0.55
Blue Pen: 1 ~ 0.65
Red Pen: 1 ~ 0.65
Black Pen: 1 ~ 0.65
2B Pencil: 1 ~ 2.4
total: 1 ~ 22.149999999999995

以垂直顺序编写文本文件

2 个答案: