Python:动态地将用户定义的数据插入到二维列表中

Question

我正在尝试创建一个供应商每周销售额的表格，如下所示:

Monday    Tuesday    Wednesday    
50        80         10
54        98         7
29        40         80

我试图让用户插入每日销售额，这是我到目前为止所得到的:

weekly_sales_list = [['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday', []]]

    for i in range(len(weekly_sales_list)):
        for j in range(len(weekly_sales_list[i])):
            weekly_sales_list[i][j] = input('input value for ' + weekly_sales_list[i][j])
    print(weekly_sales_list)

我不确定这是否是设置二维列表的最佳方法，并且我还收到以下错误:

TypeError: can only concatenate str (not "list") to str

如有任何帮助，我们将不胜感激

Answer 1

使用字典，以星期名称为键，以该星期的数据为值。

import itertools
data = {'Monday':[],
        'Tuesday':[],
        'Wednesday':[],
        'Thursday':[],
        'Friday':[],
        'Saturday':[],
        'Sunday':[]}
while 1:
    info = input('Enter day and value (e.g. "Monday 26") or nothing to stop: ')
    if not info:
        break
    k,v = info.split()
    data[k].append(v)

然后通过显示标题来打印表格:

print(*(f'{day:<10}' for day in data))

最后，使用 itertools.zip_longest 转置数据，处理值比其他日期少的日期:

for group in itertools.zip_longest(*data.values(), fillvalue=''):
    print(*(f'{value:<10}' for value in group))

示例输入:

Enter day and value (e.g. "Monday 26") or nothing to stop: Monday 3
Enter day and value (e.g. "Monday 26") or nothing to stop: Monday 4
Enter day and value (e.g. "Monday 26") or nothing to stop: Monday 5
Enter day and value (e.g. "Monday 26") or nothing to stop: Tuesday 6
Enter day and value (e.g. "Monday 26") or nothing to stop: Tuesday 7
Enter day and value (e.g. "Monday 26") or nothing to stop: Wednesday 8
Enter day and value (e.g. "Monday 26") or nothing to stop: Thursday 9
Enter day and value (e.g. "Monday 26") or nothing to stop:

结果示例:

Monday     Tuesday    Wednesday  Thursday   Friday     Saturday   Sunday
3          6          8          9
4          7
5